SEO is Search Engine Optimization, try searching for SEO or Search Engine Optimization in Google you will get more than enough information.
No one can teach u whole seo here.....its good for u to search in google regarding seo......and then the term u dont understand u can ask question here...
Research is all you need, most SEO can be done yourself if you have some basic knowledge. Download some free Seo ebooks and start learning. Thanks Brian
Just Google SEO and you will find a huge list of SEO Teaching Blogs, with video tutorials on there site, and as said earlier, you can ask about any term you dont understand.
The best thing to do is to read the many threads in the forums over several hours in your spare time and use the search bar then come back and ask specific questions.