SEO (Search Engine Optimization) refers to getting a website to rank higher for certain “search terms” in search engines like Google. When a website ranks higher, it gets more relevant traffic and in turn, can make more revenue.
This is another highly valued skill in the internet marketing world. That being said, it can be a bit difficult because Google is always changing its algorithms. With it, some of the rules of search change. You always have to be on the leading edge, learning and testing new strategies.
If you can master SEO, companies will always be willing to pay you for your help.