Last but not least, let us have the good ol’ Google Keyword Planner. Even though the GKP is a halfway decent keyword tool, it is not perfect at generating unique keyword ideas. For example, if you enter a category page keyword like “organic dog food” into the GKP, it spits out super-close variations of that term:
That said, if you do some digging, you can find some gems that are not straight-up variations of the keyword you just typed in.
Because the Google Keyword Planner does not generate numerous unique keywords, it can be recommended using it to check search volume and commercial intent. Which leads us to our next step: