Review Purge detects whether Amazon has removed reviews from a product. Review counts on Amazon normally only go up over time, so any decrease indicates that Amazon actively removed reviews — typically because they were manipulated or violated policies.
What It Measures
This metric tracks the product's review count over time and flags any decreases. Since review counts are cumulative (new reviews add to the total), a decline means Amazon deleted reviews. The analysis counts how many purge events occurred, how many reviews were removed, and how recently.
Why It Matters for Resellers
Review purges are a signal about listing health:
- Products with purged reviews may have had manipulated reviews. This suggests the listing may not be as healthy as its review count implies.
- Amazon may take further action. Review purges are often a precursor to other enforcement — listing suppression, seller account warnings, or product removal.
- Buyer perception can shift. A sudden drop in review count can make buyers less confident in the product, potentially reducing sales.
How We Calculate It
- We track the review count over time, looking for any period where the count decreased.
- We filter out very small drops (fewer than 10 reviews and less than 1% of total) because these can be caused by variation merges (Amazon combining product variants) rather than actual purges.
- For each qualifying drop, we record the number of reviews lost, the percentage drop, and when it occurred.
- We report whether any purge was detected and summarize the total impact.
How to Read the Results
| Classification | What It Means | |---------------|---------------| | Reviews removed | Amazon has removed reviews from this product. This could indicate review manipulation — the listing may face further enforcement actions. | | No reviews removed | No review removals detected. The review history appears clean. |
Products with purged reviews carry higher risk. Amazon may take further action against the listing, including suppression or removal.
Limitations & Caveats
- Small review drops may not be purges. When Amazon merges product variations, reviews can temporarily shift between parent and child listings. We filter out drops below 1% and under 10 reviews, but some false positives are possible.
- A lack of purge events does not guarantee the reviews are genuine. Amazon does not catch all review manipulation. A clean record means no detectable purges, not that all reviews are authentic.
- The impact of a purge depends on context. Losing 50 reviews from a product with 5,000 is very different from losing 50 from a product with 200.
- Review purges are historical. A purge that happened a year ago may be less relevant than one from last month.
Related Metrics
- IP Risk — Review purges combined with seller cliff events are a strong signal of IP enforcement.
- Seller Cliff — Sellers may leave a listing after reviews are purged, anticipating further enforcement.