More info on Amazon Ads
Due to the roughly 3-day lag on Amazon's ad dashboard (i.e., "Campaign metrics may take up to 3 days to appear" ), my prior post about getting enough impressions at $0.11 to $0.13 cost per click (CPC) turned out to be inaccurate. After I lowered my CPCs to these levels, I saw a large drop-off in impressions and sales. As Carol Buhler mentioned in the comments on my last post , the CPC is your 'maximum bid" amount in which you compete with other sellers for Amazon ad space. It appears dipping beneath a CPC of around $0.16 began to significantly reduce my bidding power. I understand the ad sales model is a dynamic market and winning bid rates likely fluctuate for many reasons. I'm currently experimenting with several different ads, and it appears CPC bids in the $0.20 to $0.30 range are winning a fair amount of impressions. I have noticed some ads perform in spurts, getting a lot of impressions over a period and then 'cooling off' without me changin