The Popularity of a keyword is a number shows how frequently users search for that keyword in the App Store.

Knowing the popularity of keywords, you can allocate budgets more effectively, focusing resources on keywords that are more likely to yield high returns.

In FoxData, you can view this data on Search page.

And you can see detailed information on Bidding Keywords page and Bidding Keyword Analysis page.

For you have any other questions, please check out the link: Product Feedback