Google Adsense allows you to place multiple Ads on your blog/site. However Google ad placement policy restricts the number of Ads that can be placed on a blog. Many new-bie publisher don't know How many Google Ads can be put on a web page and don't care going through Adsense ad policies leading to their account ban. Here is a short description of Adsense Ads placement policies regarding number of ads that can be placed on a blog.
- Adsense for Content Ads. Adsense publisher may put up to 3 Adsense for contents ads. However, only one 300x600 ad unit can be placed in a blog. Contents units are those which shows ads in text/graphical way to the visitors. Adsense algorithm ensures different Ads displayed at a time to these units on a web page. You are paid either per click or by impressions according to the type of ads served by Google.
- Link unit. You can put a maximum of 3 Link unit on a page according to Google Adsense ad policies. Link units are the related links shown on your blog according to the content of the blog. However, you are not paid when user clicks on these link units rather you are paid for the clicks on ads linked from these link units.
- Search Box. You can have two search boxes on a web page. You are paid for the advertisement put on the pages generated from the search boxes on your web pages.
Note. The ads in the posts are not links but images taken from Google Adsense help topics.