No one really likes online advertisements. But they do help to pay for your Gmail hosting and the occasional brilliantly written article on the web. If you’re going to be served up ads by Google then you may as well make sure that they’re about topics you’re interested in. Here’s how you can find out what Google thinks you like and make changes if required.

First, head over to google.com/settings/u/0/ads and remember that you’ll need to be logged in.

View the section titled Interests and you can delete irrelevant ones or even add new ones.