Why Are Marketplace Reviews Important? Sales Impact, New Rules and How to Respond

Marketplace reviews shape how a product looks in the search results and whether a shopper adds it to the cart, and they often matter more than the price. I have worked on ecommerce projects since 2012, and I keep seeing the same pattern: two sellers offer the same item at the same price, and the one with stronger reviews wins. In this guide I cover why, what the data says, which rules now apply and what to do day to day.

Why are marketplace reviews important?

Marketplace reviews are the ratings and comments that buyers leave after a purchase on platforms such as Amazon, Trendyol or Hepsiburada. In practice, they reduce the shopper's uncertainty about quality, fit and delivery. As a result, they influence conversion rate, basket decisions and how visible a listing becomes inside the platform.

On a marketplace, the shopper cannot touch the product, cannot talk to the seller face to face and often meets the brand for the first time. So they fill the gap with other buyers' experience. A review says what the description leaves out: the cut runs small, the fabric feels warm, the box arrived dented. In addition, the review count works as a signal on its own. After all, a product that many people bought feels less risky to the next person. In short, reviews are the sales copy you cannot control, yet they are the copy people read most.

How much do customer reviews really affect sales?

The most cited source on this question is the Spiegel Research Center at Northwestern University. According to its study, a product with five reviews has a purchase likelihood 270 percent higher than a product with no reviews. Moreover, the effect grows with price. Displaying reviews lifted conversion by 190 percent for lower priced products and by 380 percent for higher priced products.

The same research found that reviews carrying a verified buyer badge raise the odds of purchase by 15 percent. These numbers come from one data set, so do not apply them one to one to every category. Still, the direction is clear: the first few reviews make the biggest difference. You can read the full findings in the Spiegel Research Center report.

If you want to measure the effect in your own store, compare conversion before and after the review count grew. The conversion rate calculator helps with the arithmetic. Keep promotion periods separate in that comparison; otherwise you will mistake a discount effect for a review effect.

Why is a perfect five star rating not always best?

One of the most interesting Spiegel findings is this: purchase likelihood usually peaks between 4.0 and 4.7 stars and then starts to fall as ratings approach 5.0. The reason is simple: shoppers find a flawless score too good to be true and start to suspect fake reviews. As a result, a few critical comments make the positive ones more believable.

That finding should reassure sellers. A single three star review will not sink your store; in fact, a negative review that you answer well builds trust. On the other hand, a rating below 4 is a serious warning. At that level, shoppers who filter by rating may never see you at all.

In practice, your goal is not a perfect five. It is a realistic and stable band between roughly 4.3 and 4.7. So spend your energy on the causes of low scores, not on polishing the average.

Also look at the count and the rating together. A product with one review and a 5.0 score feels riskier than one with 180 reviews and a 4.5 score, because shoppers look at the crowd behind the average. Likewise, a listing with no new reviews for months can look abandoned even when the score is high.

How do marketplace algorithms use reviews in rankings?

Amazon, Trendyol and Hepsiburada do not publish their ranking algorithms in detail. Therefore treat any claim like "reach page one once you hit this many reviews" with suspicion. What we know for certain is that all three platforms let shoppers sort or filter by rating and review count. That means a low rating can remove you from a shopper's filtered list directly.

That said, the indirect effect is stronger. Ranking systems generally reward click and sales performance, and reviews feed exactly those two metrics. A well rated product earns more clicks, sells more and that performance lifts it higher. A poorly rated product, however, struggles to turn clicks into orders even when ads push it to the top.

For that reason, check your review base before you open an ad budget. The campaign formats I describe in the Trendyol ads guide can bring clicks to a product without reviews, but they cannot guarantee sales.

What is the difference between product reviews and seller ratings?

In practice, most marketplaces run two separate feedback layers. The first is the product review: quality, size, scent, durability. The second is the seller rating: packaging, shipping speed, communication and the return process. Shoppers do not always keep them apart; a late parcel can still earn the product one star.

On Trendyol, the seller score also drives badges and certain perks. I cover that side in the Trendyol seller badges guide, so I will not repeat it here. In addition, the new Turkish rules require equal visibility when product, delivery and seller reviews appear under separate headings.

What do the new Turkish rules on reviews say?

If you sell on Turkish marketplaces, a major change took effect on 1 August 2026. The Ministry of Trade amended the Regulation on Commercial Advertising and Unfair Commercial Practices, and the amendment appeared in the Official Gazette on 1 July 2026. You can read the official text in the Resmi Gazete.

The points that matter most for sellers:

• Only consumers who bought the product may review it, and platforms may not publish reviews from channels where purchase verification is impossible.
• Publication rules may not stop consumers from reviewing or restrict them to certain topics.
• When product, delivery and seller reviews sit under separate headings, all of them must be equally visible and easy to reach.
• Reviews stay online for at least one year, and sorting must follow objective criteria such as date, rating or seller.
• The window for the seller to respond shrank from 72 hours to 48 hours; if no response arrives, the review goes live directly.
• Businesses may not use reviews without a verified purchase in advertising.

In other words, growth through fake or unverifiable reviews is now legally closed in Turkey.

What does the FTC rule on fake reviews mean for Amazon sellers?

In the United States, the Federal Trade Commission's rule on consumer reviews and testimonials took effect on 21 October 2024. It gives the FTC the power to seek civil penalties against knowing violations. The FTC announcement lists the practices it targets.

In plain terms, the rule covers:

• Fake reviews that misrepresent who wrote them or whether the reviewer had real experience with the product.
• Paying or rewarding people for reviews that must express a particular sentiment, positive or negative.
• Undisclosed reviews by company insiders such as employees or managers.
• Review suppression through threats, intimidation or false claims that a review is fake.
• Company controlled "independent" review sites and fake social media indicators such as bought followers.

For an Amazon seller, this adds legal risk to what was already a platform policy violation. Consequently, a review scheme that the platform detects can cost you the account and draw regulatory attention.

How does the EU Omnibus Directive affect sellers in Europe?

If you sell into the European Union, a third framework applies. The EU's Omnibus Directive (2019/2161) added review specific provisions to the Unfair Commercial Practices Directive, and member states, including Germany, have applied them since 28 May 2022.

The main consequences for sellers:

1. A business that shows reviews must explain whether and how it checks that they come from people who actually used or bought the product.
2. Claiming that reviews come from real customers without taking reasonable steps to check is a misleading practice.
3. Submitting fake reviews, commissioning them, or misrepresenting reviews to promote products sits on the blacklist of banned practices.

You can read the directive on EUR-Lex. Put simply, Turkey, the EU and the US now point in the same direction: the verified buyer sits at the centre.

Why is buying fake reviews both illegal and bad business?

Beyond the law, marketplaces can remove suspicious reviews and sanction the store under their own policies. On Trendyol, violations can turn into penalty points; I explain that logic in the Trendyol violation points guide.

Fake reviews also fail commercially. When a real buyer receives the product, the experience does not match the inflated praise, so returns and angry reviews follow. The short term lift then turns into a lower rating in the medium term.

There is also a data cost, because fake reviews hide the real signals you need to improve the product. If you invent half your reviews, you cannot tell whether the sizing problem is real or noise. That is why my team and I never recommend this route to the stores we work with, under any circumstances.

How can you get more marketplace reviews the honest way?

Honest review collection comes down to three things: deliver a good experience, remind the buyer at the right time and never pay for the review. Specifically, marketplaces usually send their own review prompts after delivery. Your job is to make sure the experience deserves a good answer when that prompt lands.

Methods that work:

• Put a short, plain thank you card in the parcel; do not ask for stars, just ask the buyer to share their experience.
• Describe the product accurately, because a product that meets expectations earns positive reviews on its own.
• Add a short usage guide for products that need setup or care.
• On Amazon, use the "Request a Review" button in Seller Central; it works once per order, between 5 and 30 days after delivery.

The things to avoid are just as clear: discounts, refunds, gifts or points in exchange for reviews, sending reminders only to happy customers and limiting reviews to certain topics. These practices clash with platform policies and with the rules above.

When is the best time to ask for marketplace reviews?

Timing changes both the number and the tone of marketplace reviews. A reminder that arrives before the product reaches the door annoys the buyer. On the other hand, a reminder that comes too late lands after the excitement fades, and response rates drop.

Sensible windows therefore depend on the category. With cosmetics, care products and supplements, the buyer needs a few days of use to see any effect. With clothing, the buyer knows the fit after the first try, so an earlier window suits. For electronics, however, the setup and first week of use decide the verdict.

Amazon enforces its own window: you must wait at least 5 days after delivery, and the button closes after day 30. On Trendyol and Hepsiburada, the platform mostly runs the reminder flow. So the only thing under your control is whether the buyer had a good experience when that reminder arrives.

How should you reply to a negative review?

A negative review, answered well, becomes one of the most persuasive pieces of content in your store. The reason is that the reply reaches far more than the unhappy buyer; hundreds of future shoppers read it too. In other words, your reply is really a message to them.

A reply that works follows a simple structure:

1. Thank the reviewer and restate the problem in your own words, so they feel heard.
2. Do not get defensive or blame the courier or the customer.
3. Offer a concrete fix: an exchange, a refund or a support contact.
4. Do not ask for personal data; move the conversation to the platform's messaging channel.
5. Keep it short and avoid anything that reads like a copy and paste template.

The new Turkish rules add a detail here. Once the parties resolve a dispute and the platform confirms it, that outcome must appear where the original review sits. Making the fix visible is now good practice and part of the rule.

Can you remove an unfair review?

Disliking a review is not a reason to remove it. In fact, the new rules treat blocking or hiding negative reviews as an unfair practice. Therefore reserve removal requests for content that actually breaks the rules.

Examples of such content: insults or profanity, personal data, a review of a different product, ads or links, or concrete evidence that a competitor organised the review. In these cases, use the platform's official reporting channel and present your evidence clearly.

Google Business Profile reviews follow a different process. There too, only reviews that violate policy qualify for removal through official channels; we explain our approach on the Google review removal page. I recommend you do not treat marketplace reviews and Google reviews as the same process.

What can negative reviews teach you about product and operations?

Reviews are free customer research. However, most sellers read them one by one and miss the bigger picture. Once a month, export or copy your recent reviews and sort the recurring problems into themes.

A few themes usually stand out: size and fit mismatches, colour differences between photos and reality, damaged packaging, late delivery and missing parts. Each theme also belongs to a different team. For example, a colour gap calls for better photos, while a sizing issue calls for a better size chart.

This work also lowers returns, because negative reviews and return reasons usually share the same root. I discuss that link in more detail in the guide on how to reduce your ecommerce return rate.

How does the product page affect review quality?

Many negative reviews arrive not because the product is bad but because the listing set the wrong expectation. A dress without a size chart collects "not like the picture" reviews. A bag without material details earns "it turned out to be plastic".

That means your review strategy starts on the product page. For example, clear photos, true colours, a size chart, material information and usage notes set the right expectation. In addition, answering the questions section regularly removes doubt before purchase and prevents complaints afterwards.

I go through the elements of a strong listing in the ecommerce product page guide. Even on a marketplace with a fixed template, the title, images, description and attributes stay in your hands.

Does the weight of reviews differ by category?

Yes, it does. The more uncertainty a shopper carries about the product, the more they lean on reviews. Products you can only judge through use rely heavily on reviews, while products with clear specs lean more on price and delivery time.

What I see in practice looks roughly like this:

• Fashion and shoes: shoppers read fit comments first. "Order one size up" persuades more than any size chart.
• Beauty and personal care: skin type, scent and staying power decide. Even so, a single allergy complaint can change the decision.
• Electronics: failure rates, the warranty process and what comes in the box stand out. Shoppers often seek out the low rated reviews on purpose.
• Home and furniture: assembly difficulty, colour match and shipping damage steer the choice.

So build your review strategy around your category. For instance, a stronger size chart in fashion, a clear ingredient list in beauty and a photo of the box contents in electronics prevent the most common complaint before it happens.

Why are photo and video reviews worth more?

A text review is a claim; a photo review is evidence. Shoppers want to see how the product looks in real light, in a real home or on a real body. No studio shot, however good, fully meets that need.

Photo reviews also cut colour and size complaints. Shoppers see the real colour in other buyers' pictures before they order, so their expectations move closer to reality, and the risk of returns and negative reviews falls.

So how do you encourage photo reviews? Again, do not offer a reward. Instead, a polite line on the parcel card is enough: "If you add a photo of the product in use, it really helps other shoppers." When the product is photogenic, buyers often do this on their own.

On the other hand, negative photo reviews hit harder. For instance, a picture of a crushed box or a torn seam can outweigh hundreds of positive text reviews. That is why packaging quality deserves a place in your review strategy, even if nobody sees it on the listing.

How do shipping problems drag down your rating?

In many stores, a large share of low scores has nothing to do with the product and everything to do with delivery. Buyers then punish late, damaged or incomplete parcels in their rating. That rating then sits on the product page and affects the next shopper.

The first step is to standardise packaging by fragility. For glass, cosmetics and electronics, padding and double boxes cost far less than the complaints that follow a breakage. The second step is to track your handover time to the courier; a store that ships the same day sees far fewer late delivery reviews.

The third step is expectation management. State the estimated delivery date clearly on the product page and in the post purchase message; I cover this in the guide on the estimated delivery date on product pages. Finally, offer quick replacements for damaged deliveries. If you solve the problem before a review arrives, the buyer often keeps a good score and may even praise the fast fix.

Can you show marketplace reviews on your own website?

Many brands sell on marketplaces and on their own online store. It is tempting to display a strong marketplace rating on your site or in ads. The new Turkish rules draw a clear line here: if you reuse online reviews in another channel, you must reflect the overall character of the original reviews.

So cherry picking five star comments under a "customers love us" headline is a problem. Also, you may not use reviews without a verified purchase in advertising. Building a system on your own site that collects verified buyer reviews is therefore the more solid long term path.

I explain how to design trust elements for your own store in the guide on ecommerce trust signals. It also looks at reviews, return policy and payment security together.

Which metrics should you track for marketplace reviews?

You cannot improve what you do not track. A handful of simple metrics is enough, and most seller dashboards already show them. However, read the numbers as trends over time, not as snapshots.

• Average rating and rating over the last 30 days: a gap between the two is an early signal of a new problem.
• Review rate: reviews received per delivered order.
• Themes in low rated reviews: shipping, product, packaging, fit.
• Response time to negative reviews: it should fit within the new 48 hour window in Turkey.
• The relationship between review count and conversion rate.

With the stores my team and I work with, we keep these metrics in a monthly table. That way we catch a falling rating before a wave of bad reviews.

Where should you start with review management?

You do not need a big system to begin. The sequence below works even for a small store: first see where you stand, then fix the rules, then build the routine.

1. List your ten best selling products with rating, review count and 30 day trend.
2. Sort low rated reviews into themes and pick the three most frequent problems.
3. Fix those problems on the product page, in packaging or on the supply side.
4. Set up a routine to answer negative reviews within 48 hours.
5. Stop any review collection practice that involves an incentive.
6. Review the metrics once a month.

When you look at marketplaces, your own site and advertising together, the picture gets more complex. If you want to build that whole system, my team and I can work through your reviews, product pages and operations as part of our ecommerce consulting. In the end, marketplace reviews are not a marketing trick; they are a mirror of the business itself. Improve the product and the delivery, and the reviews follow.