Conversion rate drops and the first question I get is about the campaigns. "What
By Elizabeth Greene · October 1, 2026 · Curated by George's Blog
Conversion rate drops and the first question I get is about the campaigns.
"What changed in the campaigns?"
Usually? Nothing.
Same bids, same targets, same structure that was converting fine two weeks ago.
So the problem probably started somewhere other than the account.
If you slipped from two-day to five-day, or you're partially out at one warehouse and Amazon is quoting a week to half the country, your conversion rate is going to fall and nothing in your campaign manager will tell you why.
Same click, same bid. Different answer to "when does this show up at my house."
And then CPCs feel worse, ACoS climbs, and the instinct is to cut bids on the campaigns that look expensive.
You just took spend away from a product that's still relevant, still getting the click, and is losing the shopper on the delivery promise.
Now you've got a conversion problem and a visibility problem on the same listing.
If sessions are down, if pricing changed, if inventory is low, if a competitor's listing got stronger, the ad account reflects all of it.
So before deciding what the ads should do next, I want to know what's actually happening in the business: are sessions holding, is one product doing this or all of them.
Through stretches of supply chain delays and bestsellers cycling in and out of stock, with the Buy Box going unstable, I'm mostly keeping the structure clean and protecting TACoS so that when the stock lands, you're built to scale.
Anyway.
Go look at the delivery estimate on your listing.
Then go look at your conversion rate for the same window.
What does it say?