
Adwords is the Pay Per Click (PPC) advertising option from Google. All the major search engines have their own version of PPC advertising. The basic concept is this: you place an ad that targets a specific keyword related to the product, service, or website you are trying to get traffic to. When someone types in that keyword into the search engine they will see ads at the top, bottom and sides of the results page (if you've done it properly one of those ads will be yours).
They will click on an ad and be taken to the website of whoever placed that ad. The advertiser will then be charged, hence the term pay per click. In order to make this work you need to choose the keywords you're going to use carefully, and that's where the adwords keyword research tool can come in handy. ..