Worth noticing
- What they lead with — price, shipping, guarantee.
- Which products they push, and which they do not.
- Whether they bid on your brand.
The trap
Assuming persistence means profitability. Plenty of advertisers run losing campaigns for months. Copying them copies the loss.
How to check cheaply
Auction insights for overlap and position. The ads transparency tools for what they are running. Your own search terms report for where you actually meet them.