The likes of Google Keyword Planner, Ahrefs Keyword Explorer and SEMrush Keyword Overview tool can all do this for you.

Once you have all your keywords identified, the next important step is to review the current SERP. You need to do this so you can see what type of content Google has identified as serving searcher intent.

Going back to our coffee example you can see the type of content that is ranking the most is reviews of coffee machines.

So, in this instance, it would be best to create a listicle type article along the lines of “The Best Coffee Machines In 2021 [Complete Review]”

You’ll need to do this for each keyword, or keyword group, that you have identified. This is time consuming, but if you don’t do it you may create the wrong type of content and have no chance at ranking.