You sign up for an account at (you need to provide correct personal data)
Download their browser add-on for either Chrome or Firefox (other browsers work, too, but these two pay the most) and their restarter program (which restarts the browser in case it crashes)
Start your surfbar at (fill in your own username!)
Profit
Yes, that's literally it. There're a few options you can play with, but for making money that's all you need to know and do, everything else is fully automated.
Once you've reached the payout threshold of about $2,50, you can withdraw your money either via PayPal or via bank transfer.
How it works is the app uses up to 10% of your unused bandwidth whenever you're connected to wifi (you can also use your mobile data and set limits) for their own research and in return pay you "honey" (which can be converted into money) depending on how much data you share
Don't worry though! Honey doesn't use any personal or private data (such as your search history) and doesn't compromise your security whatsoever; they merely use the data so their clients can optimise search engine responses for example.
All you need to do is have the app running and it will passively generate these points. You obviously won't be gaining a fortune from it but it's definitely something when you're doing nothing to earn it.
You can have up to 6 devices connected to your account at once and theyll all share data separately. Sadly the threshold to payout is $20 worth of points through PayPal but it's ok when you can leave it running for a few weeks and come back to cash out.