Take a look at this short, four-minute video that explains how the Internet and Facebook use our information for advertising.
From an Internet Marketer (and the like) perspective, this stuff is gold; but from a general user of the Internet perspective – particularly for older people – this stuff is like black magic! It’s not like that, it’s just the way things work at the moment.
You just have to be careful about what ads you click on and who is behind them.