To the uninitiated, keywords are words that people search for online - those are the words that people type into a search engine when looking for information.
For that matter, every word is a keyword, but if you are aiming at a certain market, you will want to use keywords pertaining to that market.
Your keywords will also bring you adverts related to your keywords, if you use Google Adsense.
Your keywords should be in:
- your Title
- your Header file
- Your URL
- your Meta-Tag Description.