To new visitors yes. To people who have already visited similar sites to your niche, then it becomes more relevant. However, a company might pay you $5 for a click on your site, if for example i happen to come across it, and then get targeted ads to MY biggest interests, and then sign up from your ad.
So you could have the shittest keywords, and still make money, or the best keywords and make no money.
lol, build your site, increase and improve your content, and learn from there.