- This video explains exactly how Fourerr works, why you should use Fourerr as a seller, what you can sell on Fourerr, how to submit your gigs and how to provide quality and stand out of the crowd so you get a lot of sales. In addition we will discuss how you go about handling complaints. br br This is a must see video for anyone who is serious about buying on Fourerr and how to receive a lot sales by following a few very clear steps, explained in the video.