How Important Is Keyword Research to Find Niche?

A lot of times you'll Google the keyword and you'll be a little perplexed, right? Like, well, there's a couple articles that are on that specific topic is a couple that aren't. Take take the both keywords and then see if you're getting similar results. If like eight out of the 10 articles are the same - that's a good sign to combine the keywords. But I do think it's important to do actual keyword research before you even buy a domain.