Everybody who has a website wants to have a lot of visitors. Besides search engines, there are very popular services called banner exchange programs. The name says it all - you exchange banner views with other members. Your banner will show up on other member websites and on your website will be banners from other users. Typical banners are 468x60 pixels or 400x40 pixels and it is usual that you get one impression of your banner for two impressions of banners on your pages (it is the ratio 2:1).