I’ll talk about the search volumes that you should consider and NOT consider for your niche site.
Here are the ranges (ALL are purely my opinion):
Very High: 9000+
High: 2500 – 9000
Med: 720 – 2500
Low: 250 – 720
Ultra Low and Long Tails: under 250
The Keyword Golden Ratio
16+ examples of Amazon Affiliate Sites (with 15,000 keywords): https://nichesiteproject.com/amazon-affiliate-sites-examples/
About Niche Site Project: http://nichesiteproject.com/about/
DOUG CUNNINGTON, PMP writes about SEO, productivity, project management, and niche sites. His work has been featured all over the web, including Ahrefs, Empire Flippers, Niche Pursuits, Side Hustle Nation and more.
I am an internet marketer and a Project Management Professional (PMP, certified in 2008 by the Project Management Institute).