I am 5 years of experience SEO full-stack, going to launch easy course - need topic suggestions

Hey guys,

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I have 5 years of practical experience in SEO, working with almost everything for high competitive US markets. Looking for some topics start my easy SEO course with simple and easy-to-understand analysis with examples.

I thought about technical analysis, Search Console, keyword research, content and backlinks strategies and so on. What do you think is the best for SEO starters or middle-level specialists, what niches are not decently covered?

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thx for suggestions