Amazon Listing Audit: The 14 Signals That Determine Your Ranking Score

The majority of active Amazon listings convert at 1–3% when the category benchmark for optimized listings is 8–15%. That gap is almost never a product problem. It is a listing quality problem. Sellers who understand this stop asking “why is my product not selling” and start asking “which specific dimension of my listing is failing” — and those are very different questions with very different answers.

The MerchandisePROS Amazon Listing Audit evaluates your ASIN across 14 key signals that Amazon’s A9 algorithm uses to determine ranking and that buyers use to make purchase decisions. Each signal is scored individually, weighted by its relative importance, and combined into a 0-to-100 composite score. The result is a free PDF report that shows you exactly where you stand and, critically, what to fix first.

Why Most Amazon Listings Underperform

Amazon has over 350 million products listed on its platform. The top 1% of listings in any category consistently capture 40–60% of the sales. The difference between a top-performing listing and an average one is not luck or ad spend — it is the systematic optimization of the signals that determine both visibility (ranking) and conversion (sales from visits).

Most sellers who reach out to us have been selling for 12–24 months and have a product that generates some revenue but cannot break through to the next level. In almost every case, the diagnostic reveals 3–5 specific listing gaps that, when fixed, produce a measurable improvement in ranking and conversion within 30–60 days.

The 14 Signals of the MerchandisePROS ASIN Audit

Here is what each signal measures and why it matters:

1. Product Title — Amazon’s algorithm gives significant weight to the product title for keyword indexing. The audit checks whether your primary keyword appears in the first 60 characters, whether the title is within Amazon’s category character limits, whether it follows category-specific style guide requirements (brand + keyword + key feature + size/quantity), and whether it reads clearly to human buyers rather than just stuffing keywords. A title that fails the style guide can trigger suppression.

2. Main Image — The main image is the single most powerful conversion driver on Amazon. Amazon requires a pure white background, the product occupying at least 85% of the frame, high enough resolution to support zoom (1000x1000 minimum), and no text or graphics overlaid. The audit verifies compliance and flags common violations that trigger listing suppression or hurt click-through rate from search results.

3. Secondary Images — Beyond the main image, the audit checks whether you have at least 5–7 secondary images, whether they include lifestyle shots (product in use), infographic images (key features called out), and a size or scale reference image. Secondary images are where conversion happens — buyers who click on your listing make the purchase decision based on what they see in the image gallery.

4. Bullet Points — Five bullet points, each starting with a capitalized key feature or benefit. The audit checks whether your bullets lead with benefits rather than features, whether they include natural keyword integration without stuffing, whether each bullet is an appropriate length (80–200 characters is optimal), and whether they address the primary purchase objections for your category.

5. A+ Content — A+ Content (formerly Enhanced Brand Content) is available to brand-registered sellers and is one of the highest-impact listing improvements available. The audit checks whether A+ Content is present, whether it uses high-impact modules (comparison charts, lifestyle imagery, feature highlights), and whether it is telling a coherent brand story or just repeating bullet point information.

6. Price Competitiveness — Price directly impacts Buy Box eligibility and conversion rate. The audit evaluates your price relative to the top 5 competing ASINs in your category, checks whether you currently own or are eligible for the Buy Box, and identifies whether your price positioning is likely to trigger suppression (Amazon can suppress listings it considers priced too high relative to historical data).

7. BSR (Best Seller Rank) — BSR is both an output (a reflection of your recent sales velocity) and an input (it affects how prominently Amazon displays your product in category browse and sub-category pages). The audit records your current BSR in your primary category and subcategory, and evaluates the trend direction over the last 30–90 days using historical rank data.

8. Ratings and Reviews — Star rating and review count are among the highest-weighted conversion signals on Amazon. The audit evaluates your average star rating against the category median, your total review count against category benchmarks, and your recent review velocity (reviews per month in the last 60 days). A declining velocity with an old review base signals a listing losing momentum.

9. Indexed Keywords — Keyword indexing determines whether your product appears when buyers search for specific terms. The audit checks how many of your primary target keywords are currently indexed by Amazon’s search engine, identifies gaps between your indexed keywords and the top keywords used by leading competitors in your category, and evaluates whether your backend keyword fields are fully utilized.

10. Product Description — While less weighted than bullet points for A9 ranking, the product description is read by buyers who are already highly interested. The audit checks the technical depth of your description, whether it is aligned with the primary search intent for your category, and whether it is formatted for readability (Amazon allows basic HTML formatting in the description field).

11. Variations — Parent-child variation structure affects how reviews are consolidated and how multiple size or color options are presented to buyers. The audit checks whether your product should be organized as a variation family (and is not), whether your current variation structure correctly consolidates reviews across child ASINs, and whether variation titles and images differentiate clearly between options.

12. FBA vs. FBM — Fulfillment method directly impacts Buy Box eligibility and Prime badge display, both of which have major effects on conversion rate. FBA listings have a structural conversion advantage over FBM listings because of the Prime badge and the trust signal of Amazon’s fulfillment network. The audit flags FBM listings where FBA would likely improve conversion.

13. Listing Age — Amazon’s algorithm applies a maturity weight to listings. New listings (under 90 days) have not yet accumulated the sales history, review velocity, and conversion data that older listings have. The audit records listing age and cross-references it with review velocity to identify whether a listing is building momentum appropriately or stalling at an early stage.

14. Sales Velocity — Estimated monthly units sold is compared against the category average for your price range and subcategory. Sales velocity is the most direct signal of listing health — a listing with strong signals across the other 13 dimensions but low sales velocity is usually facing a specific bottleneck, most commonly in pricing, main image, or review count.

How Signals Are Weighted

Not all 14 signals carry equal weight in the composite score. The weighting reflects their relative impact on the two outcomes that matter most: ranking visibility and conversion rate.

The Score Breakdown for Amazon

The composite score correlates with observable conversion rate ranges across the Amazon listings we have analyzed:

• 85+ (A): High-performing listing. Conversion rate is likely 8–15%. Focus on incremental improvements: A/B testing main images, split-testing titles, expanding A+ content modules.
• 70–84 (B): Solid listing with specific gaps. Conversion rate is likely 5–8%. Typically missing A+ content, has suboptimal secondary images, or has a review velocity that has plateaued.
• 55–69 (C): Moderate listing with multiple gaps. Conversion rate is likely 3–5%. Usually has title or bullet point issues, insufficient review count for the category, or pricing that is not competitive enough for the Buy Box.
• Below 55 (D/F): Underperforming listing with critical gaps. Conversion rate is likely under 3%. Almost always has at least one critical-weight signal failure: main image compliance issue, no A+ content, very few reviews, or a pricing problem that is suppressing Buy Box eligibility.

The 3 Signals Most Sellers Get Wrong

After analyzing thousands of listings, these three signals are the most frequently misunderstood or incorrectly executed:

1. Main image technical compliance. Most sellers focus on the visual quality of the main image and miss the technical requirements: pure white background (RGB 255, 255, 255 — not off-white, not light gray), product occupying at least 85% of the frame, and minimum 1000 pixels on the shortest side for zoom functionality. An image that “looks fine” visually may still be failing compliance tests and suppressing listing visibility.

2. A+ content module selection. Many brand-registered sellers have A+ content but use it as a place to repeat their bullet points with better images. The highest-performing A+ content uses the comparison chart module (which reduces buyer uncertainty by clearly differentiating product variations or related products), the brand story module (which builds trust and reduces return rates), and the feature highlight module (which handles the most common buyer objections before they arise).

3. Review velocity management. Having 500 reviews from 3 years ago is not the same as having 500 reviews with 15 new ones in the last 30 days. Amazon’s algorithm weights recent review velocity more heavily than total review count for ranking signals. Sellers who were dominant three years ago and stopped actively managing their review request sequences are silently losing ranking to newer competitors with lower total counts but higher recent velocity.

“The sellers who get the most from the ASIN Audit are the ones who were already generating revenue and knew something was holding them back. The audit gives them a specific answer instead of a vague direction. More times than I can count, one fix to the main image or one A+ content update has produced a 40% conversion lift within 30 days.”
- Diego Medina F, Founder of MerchandisePROS

How to Get Your Free ASIN Audit

Go to the Free Audit page, select “Amazon ASIN Audit,” enter your product ASIN (the 10-character alphanumeric code found in your Amazon product URL or Seller Central dashboard) and your email address. Our AI retrieves live Amazon data for your ASIN, evaluates all 14 signals, and sends a PDF report to your inbox in under 60 seconds.

The report includes your composite 0-to-100 score, individual signal scores, the 3 most critical gaps identified, and a 90-day action plan with prioritized, concrete steps. No Seller Central access required, no credit card, no fine print.

Frequently Asked Questions