When creating and structuring your campaigns, determining how many keywords should be in your ad group may not be at the forefront of your mind. However, the number of keywords or product ads you choose to put in an ad group could make or break its performance.
A common strategy people try is called keyword dumping, sticking thousands of keywords per ad group, and we strongly advise against this.
We believe the target number to hit is 1-35 keywords per ad group.
- How Keyword Dumping Ruins Your PPC Campaigns (video)
- How Many Keywords Should You Have Per Amazon Ad Group? (long read)
- The Strangest, Most Popular Amazon Ads Strategy: The Keyword Dump (podcast)