what is google adwords and how does it work ?

Adwords is the name Google has given it's advertising platform. I could write you a book on how Google Adwords works, but I'll keep it simple. If you are not a Google Advertising Professional it is best in most cases to hire one. There are many indpendent firms who will help you advertise on Google effectively. If you would like to learn more about how Adwords works visit http://adwords.google.com and read the online tutorials. Unless you operate in a small niche market with little or no competition, or are ready to dedicate a lot of time to learning Adwords, leave it to the pros.