I've launched a new auto campaign for a new item on April 23rd, and took a look today to see some results.
I looked at the "what Amazon thinks", and found that while the top of the search terms are not exactly my item, they are closely related to it, and are relevant to the audience that buys it. For an example - if my item was a coffee grinder cleaning kit (that could be a great gift), the search phrases that have got the biggest amount of impressions are - "coffee gifts", "coffee grinder" and some ASINS of coffee grinders.
As of so far, the campaign had 46K impressions/ 0.09% CTR and 3 purchases.
I can see the CTR is low, but the search terms do seem relevant.
Any ideas on that matter?