This site if for businesses who have small tasks that don't need in-house hired help to perform small tasks like going to a certain website, clicking on a link or trying and app, and reporting results, or sometimes posting an ad. The tasks are all different, but small pay. Too small if you ask me. Pay is like 0.10 for a 2 minute job, but some range higher depending on the payer.
The site would be great if it weren't filled with SPAMMERS! Tons of spam listings that all you'll rack up is junk mail and such. There will be tons of listings one page and only maybe one of them are genuine. But if you are a business, you're not getting a lot of results since spammers are scaring them off. If you're an online worker, the jobs would look simple and legit, until you realize the site you were led to were one of those "you won a prize", now enter your info, and claim at least 3 promotional offers to get the prize. But the tasks will just tell you to go to the site and then tell you to enter the url at the end of the process (process not explained) and you'll get paid for the url.
ShortTask doesn't weave through the spammers to delete them. If you actually want a legit job for side cash, go to UserTesting.com. Website owners will pay to watch a real person use their site so they can discover where their site is confusing. It's done by video recording your computer screen, and you get paid $10 per website. Tasks are about 10-25 minutes.