We often see them every time we search for something online but we may not are aware what they're called exactly. Adwords are Google's thing. They are sponsored ads that appear either at the top or at the right hand side of the page.
People, groups or company who wish to gain good amount of traffic to their website can create adwords text from Google at a certain cost. Keywords that are relevant to your website or to the product you are selling are what can possibly drive targeted traffic to your site. You need to create a Google account to get started. (Check out adwords guide).
To use adwords effectively, you will need to figure out the adwords guide pages provided by successful adwords users to learn more about it.