Do you use Product ads or Keyword ads generally? Which has better results for you?

Hi, I’m trying to maximize my conversions for my dog product, which falls into the niche of helping dogs with separation anxiety.

I’ve noticed that the product ads have a lower CPC than the Keyword ads. So far I’m not having much success with either.

Do most Amazon advertisers here use one type of ad vs the other? Any tips?

Currently with the keyword ads I’m taking the keywords that aren’t converting well and adding them to the negative keyword list. I have one keyword (broad match) that’s working better than the rest, so I’m increasing the CPC Max bid. Currently it’s at $2.75 which is pretty high, but any lower and I’m not getting enough impressions.

Thanks for the help!