It’s just an ordinary day. On your way to work you are searching for interesting content on your mobile device. Occasionally, various ads distract you. Some of them irritate you, but maybe you find others pretty interesting. When you find something interesting, a simple click will direct you to the source of the ad.
When you visit the source that the ad referred you to, you might get overwhelmed with information that does not interest you, but you may also find that product or service that got you interested in the first place. It happens to people daily.