Earn some extra income for placing ads on your website or blogs

This the era of advertisement.If somebody really want to earn online then he/she should opt for online advertising. There are many website which offer placing ads on your websiteor blog.Some of them are Google adsense, bidvertiser, chitika, Amazon.com, Kontera, yahoo etc
Google adsense is highest payer so far my knowledge.I will discuss about Google adsense in my next post.
Now about ads.
There are many type of ads like text link ads, Banner ads etc.
You get paid from text link ads when some body clicks the ad. You get revenue from banner ad when somebody view your ad. It is calculated on the basis of CPM.
Suppose the CPM rate is 4 dollars that means if your page viewed thousand times then you get 4 dollars.
There are another type of ads,hyperlink ads provided by Kontera.They hyperlink some word of content if anybody clicks the word then he get paid by them.