I hope I said that right. How do you find seed keywords for your niche? I mean, if you niche is a broad one, what should you do?
Google pays more attention to synonyms nowadays so it's best to start there. For example you can go to a site like Thesaurus.com. Input your keyword and this tool will come up with many of it's synonyms you can than use as seed keywords. Another great way is to Google glossaries. Glossary is basically a list of terms common in the particular niche. I made an example search for weight loss glossary -> here. You will find some hidden seed gems this way. Hope this helps, Tibor