Click-through rate on Amazon search terms: a hint, not a verdict

Click-through rate is the first number that moves when a search term starts running. It arrives days before the first order, so it is tempting to judge search terms by it: high click-through rate means relevant, low means pause. We checked this on real accounts. The search terms with a higher click-through rate did sell at a lower ACOS in most accounts. But the low click-through terms brought most of the orders, and almost a third of them were doing well.

The measured numbers below come from the Sponsored Products search term report of 12 advertiser accounts in Europe, the UK and the US, day by day from March 28 to September 29, 2026. Not every account ran for the whole period. We stopped on September 29 so that the ad-attributed sales are close to final. That is 41,921 daily rows and 60,237 clicks. Every comparison is made inside one account and one currency, because a click in pounds and a click in dollars cannot be averaged together. Below, "account" means one account in one currency.

What we compared

Click-through rate (CTR) is clicks divided by impressions. We added up each search term across all campaigns of the account for the whole period, and left out the searches that are an ASIN (a product page, code starting with B0). They were 38.6% of all clicks, and a click on a product page behaves differently from a click on a search results page.

We kept search terms with at least 500 impressions and at least 10 clicks, so that the click-through rate is not built on two clicks. 9 accounts had at least 10 such search terms. Together that is 214 search terms and 20,447 clicks. Inside each account we sorted the terms by click-through rate and cut the list in half at the median. The median click-through rate was between 0.86% and 2.89%, depending on the account.

The high click-through half sold cheaper

7 accounts had at least 5 orders in both halves. In these:

  • In 5, the high click-through half sold at a clearly lower ACOS: for example 18.5% against 27.8%, 24.6% against 32.9%, and 38.8% against 64.5%.
  • In 1, the two were practically the same: 35.9% against 36.5%.
  • In 1, the high click-through half was slightly worse: 21.6% against 20.3%.

The click was also a little cheaper. In all 7 accounts, the high click-through half paid less per click, between 1% and 17% less, with a median of 6%.

The conversion rate (orders divided by clicks) was higher in the high click-through half in 6 of the 9 accounts. In one of the 6 that rested on 2 orders against 1, which is too few to count.

But the low click-through half carried the account

Across all 9 accounts and 214 search terms, the low click-through half brought 71.1% of the orders and 75.4% of the spend. These are mostly the broad, high-volume searches: they show the ad very often, so the rate is low, but the number of buyers is high.

And it was not the bad half. We compared each search term with the overall ACOS of its own account:

  • 33 of the 109 low click-through terms (30%) sold at or below the account's ACOS.
  • 46 of the 105 high click-through terms (44%) did the same.

A rule that pauses search terms below the median click-through rate would have paused those 33 terms too.

The link is weak at the level of a single term. Inside each account we ranked the terms by click-through rate and by conversion rate and measured how well the two orders match (rank correlation, 1 is a perfect match, 0 is none). The median was 0.15. The range was from -0.25 to 0.62. So a term's click-through rate tells you little about whether that term will sell.

This is not a test. The two halves can lead to different products at different prices, and a term that shows mostly on top of search gets more clicks per impression than one that shows on product pages. What the numbers show is a tendency across a group of terms, not a rule for one term.

What we could not see

The search term report practically only lists searches that got a click: of the 41,921 daily rows above, 5 had zero clicks. So the searches that showed your ad many times and never got a click are not in the report, and the click-through rates you see are already the better part. We did not split by product or by placement. The 500 impression, 10 click and 5 order cut-offs are our choice, not a measurement. And the report counts purchases for 7 days after the click.

Check it in your account in 20 minutes

  1. Download the Sponsored Products search term report for the last 60 days, ending at least a week ago.
  2. Delete the rows where the search is an ASIN (starts with B0).
  3. Make a pivot table by search term with impressions, clicks, spend, orders and sales. Keep the terms with at least 500 impressions and 10 clicks.
  4. Add click-through rate (clicks divided by impressions), sort by it, and mark the top half and the bottom half.
  5. Compare the conversion rate and ACOS of the two halves, then count how many bottom-half terms sell at or below your account ACOS.
  6. Decide on each term by its orders and ACOS. Use a low click-through rate as a question for the product page, not as a pause rule: does the main image, the price, the rating or the title match what this buyer typed?

A high click-through rate is a good sign for a group of search terms. For a single term, wait for the orders.