What is Swagbucks? Swagbucks is basically a search engine. You get rewarded with swagbucks for searching the web. You also get rewarded for other things, like shopping, completing offers, viewing vidoes, signing up for sites, etc. You can trade your swagbucks in for all sorts of different rewards. A $5 Amazon GC takes 45 Swagbucks.
If you haven't signed up yet, you may want to do so before February 25, as there is supposed to be a huge birthday celebration.
You can sign up using the widget.