How do you find the best keywords to use in an ad?

[jowel]

semrush

 

[softhex]

use keyword planner and pick simple buying keywords like buy or product names then refine later from search terms report

 

[mindx]

I mostly check what people are already searching for and test few keywords first. then I keep the ones bringing better clicks or conversions.

 

[JustAnotherUser]

Start with what your customer would actually type, not fancy marketing words. Then use Google Keyword Planner or search suggestions, and pick keywords with clear buying intent and decent search volume but not super broad.