Hi John williams!
Welcome aboard! I don't want to be the first to jump on you, but I am not sure I understand your questions about 'types' of SEO.
SEO or Search Engine Optimization is all about getting a website or page to rank well in organic Search Engine Results Pages (SERP's)
However, there are many different tactics or strategies that are all part of SEO. As an example, SEO includes
- Page Titles
- Meta Descriptions
- Content (optimized with keywords)
- Using 'alt' text
- On site link strategy
- CLEAN code
- Good text links (anchor text)
Those are the more important ones
Hope this helps! Good luck!