Some of the biggest free web space providers insist you have their console at each page. Other times, commercial sites pay you to put their console on your page. We've been at a site that loaded up six different consoles. Almost all consoles are ads for something your surfer does not want to see. They will close the consoles as soon as they see them.
Some consoles are hard to get out of.
They are programmed to open up a second console when they are closed. Some sites open consoles faster than you can close them. Once, we had twenty-seven consoles opened on one web page. They use one as a navigation tool. Unless you are using a console like this, don't use them.