How to add free advertisements in your website/blog ?

This is a main thing that most of the people used to thing when they make free websites,that they need to make money online through their website.Here are two site links we are presenting for you :-

Chitika and Bidvertiser 

This sites give free advertising in your site which people click on the ads you will earn money.If they ask you that which category/type you are going to use your account,that is Advertiser, Publisher or Referral.You need ads on your website so you have to choose publisher so they will give you the html/Javascript code for you then you just paste that in your website/blog...