They are a great site as there are lots of different ways to earn with them, you can earn points by taking surveys, doing web searches, watching videos or completing offers.
How it Works
You first need to sign up for a free profile, you can do this HERE.
Then you can take a look around and start earning swagbucks, you can then trade your swagbucks in for shop vouchers or via paypal. You need 849SB for a £5 amazon voucher or 17999SB for £100 into your paypal account.
I have found that earning on this site can be quite unstable, sometimes I could earn 300SB in a session, and other times I find it hard to make more than 15SB, it is just the luck of the draw. None the less I think that this is a great site and would definitely recommend it.