Finding keywords that convert means looking for words people use when they are ready to buy, not just to read. For example, phrases like "best budget phone under 200 dollars" show clear buying interest. It is better to focus on longer phrases because they show what the person really wants. Also check what kind of pages show up on search results, because if you see many product reviews, it means buyers are searching. It also helps to read forums and see how people ask questions. What signs do you think show strong buying intent?