
like almost every single website. they take all information that you have stored in your computer, such as your location (ip address), passwords, credit card information, etc. etc. and can sell them to foreign companies, but mainly they access what websites you've previously visited (cookies) to sell that info to other companies so those companies can present ads to you for their product so you can buy it. basically, if you dont use a vpn, mangago knows where you live and other information and sells that to people interested.

companies buy this information to cater to you to sell their products. for example, they find out where you live. well most people in your area buy x, so you'll start seeing ads for x. you visit these websites, which cater to y, so they'll advertise y to you on other websites such as google. non-secure websites (such as mangago) and illegal websites (such as mangago) do this in order to make money to keep on running. mangago is not only illegal but shows no ads, so how do you think they make money? by selling your location and history to other people.
Does mangago have ads I've never seen them