Methodology · Verified against Amazon Seller Central, 27 August 2026
Sessions are falling and conversion is holding. That is a visibility problem, and when it bleeds 3–5% a week it is nearly always rank decay. The instinct is to raise bids until the number comes back, and it’s usually the most expensive available option.
What this is. The diagnostic order we work every declining account in, published in full. No client data — the sequence and the thresholds are the asset, and they’re the same whether we run it or you do.
Why bids are the wrong first move
If the cause is a conversion problem, higher bids buy more traffic into a listing that has already stopped converting. If it’s lost organic position, they paper over a rank slide that keeps widening underneath. Either way you spend more to stand still, TACoS climbs, and the real problem gets a month older.
Step one: traffic problem, or conversion problem?
Two numbers answer it, and Amazon states the logic itself in Seller Central: “If sessions are down but conversion rate is stable, you have a traffic problem. If sessions are steady but conversion is dropping, you have a listing or pricing issue.”
Business Reports → Detail Page Sales and Traffic by Child ASIN. Pull sessions and unit session percentage over a rolling 30 to 60 days, against the same period last month and last year.
At child ASIN level, not account level. Account averages hide exactly what you’re looking for — one collapsing SKU inside a stable catalogue disappears into the mean.
| Sessions | Unit session % | What it is | Where to look |
|---|---|---|---|
| Flat | Falling | Conversion problem | Price, images, reviews, Featured Offer, a competitor’s new offer |
| Falling | Flat | Visibility problem | Organic rank, indexing, impressions, ad budget |
| Falling | Falling | Structural | Suppression, variation split, category change, account issue |
| Flat | Flat, revenue down | Mix or price | Discounting, unit price, which SKU is selling |
That last row catches people out. If both metrics hold and revenue still falls, you haven’t lost customers — you’ve changed what they’re buying or what they’re paying.
Sessions flat and sales still falling? That case has its own page: why Amazon sales drop when traffic is flat.
Step two: cliff, or bleed?
The shape tells you which family of causes to investigate.
A cliff is 30% or more inside a day or two, with a clear before and after. Something broke, and it’s almost always technical.
A bleed is 3–5% a week for six weeks, no obvious start date, and by the time it reaches a meeting the account is down a third. This is nearly always rank decay, and it does the real damage — because Seller Central sends no alert when a product slips from position 3 to position 14. The traffic simply stops arriving.
Step three: rule out the five technical causes
Two minutes each. Do all five before considering anything more sophisticated.
- Featured Offer loss. Check the percentage in Business Reports. Fastest possible explanation, most commonly missed — sellers assume the Buy Box only moves on price, but late shipment rate, inventory availability and fulfilment performance all affect rotation.
- Suppression. Manage All Inventory, filter by suppressed. The listing stays live enough to look fine while ranking nowhere.
- Stockout, including a brief one. It costs the position you spend weeks rebuilding. And low inventory can hurt before you run out.
- Variation split. If a parent-child relationship breaks, the reviews and history carrying the child vanish from view.
- Price move. Yours or a competitor’s. Check whether a coupon ended on the day the graph turns.
Step four: the six 2026 causes most checklists miss
The steps above haven’t changed in years. These have, and they’re where unexplained cases are landing right now.
1. Amazon rewrote your title
On 27 July 2026 Amazon cut titles to 75 characters and began rewriting non-compliant ones with AI, gradually, listing by listing. Non-Brand-Registry sellers got no review window; Brand Registry sellers who let the 14 days lapse got Amazon’s version. Those rewrites can drop a keyword that was holding organic position, and the loss surfaces weeks later as a slow bleed. Compare your titles against what they said in June.
2. Amazon changed other listing content
Bullets removed, categories reassigned, images suppressed. Pull your live listing content weekly and diff it against your master copy.
3. Discovery moved to Alexa for Shopping
Amazon retired the standalone Rufus assistant on 13 May 2026, replacing it with Alexa for Shopping — built into the main search bar, showing AI overviews above results, default for signed-in US customers with no Prime or Echo required. Expect 30 to 60 days of volatility in PPC metrics while discovery patterns settle.
4. Impressions fell before sessions did
Genuinely diagnostic. Impressions declining ahead of sessions points to partial suppression or lost keyword indexing rather than reduced demand — demand shifts move both together.
5. One bad ASIN is dragging the rest
Late shipments and complaints on a single SKU can pull performance across a catalogue. Broad and shallow decline? Look for the ASIN with the worst fulfilment history.
6. Account Health is green and still hiding something
Green means no open violations. It doesn’t mean no soft suppressions or latent policy risk.
Step five: confirm rank decay, and find who took it
Sessions falling, conversion holding, technical causes ruled out — you’re looking at lost position. Now prove it.
- Baseline. Search Query Performance in Brand Analytics gives impressions, clicks and purchases by query for your ASIN. That’s the list that matters, not the one in your listing.
- Current position. Compare against rank history. If you have none, start recording today — you can’t diagnose a slide you never measured.
- Who took it. Run a reverse ASIN lookup on the products now sitting where you used to.
“We lost rank” isn’t actionable. “We lost positions three through seven on our two highest-converting terms to a competitor who launched a 3-pack at £4 under us” is.
We run this on every account before we touch a bid
The forensic audit works the full sequence, including the rank baseline most accounts have never established.
Prepared by Ecom Enable. Amazon guidance, policy dates and platform changes verified against Seller Central on 27 August 2026.