As is well known in recent years, advertising becomes more aggressive, but looking at it from the site owners the situation is somewhat different.
We mention a few types of advertising, which is the most common:
Banners - simple graphic, which are becoming less effective, but still popular are those with size 300x250
Sponsored links - if they are well matched to the content of this occasion then you can increase your position in Google, and the addition of interest to you.
Popups - a form which is almost from the beginning of the Internet, cpm ads are effective, perhaps a little annoying but extremely profitable