This is a free ads Module and can be used to display Ads from Google and Bidvertiser in any module position. You have many options to display an add. There are various formats and various styles. Just download and install it to check for yourself.
Just give your publisher ID in the box provided. For ex- pub-012345678909876. It will start working.
For getting bidvertiser ads code visit their site at http://bidvertiser.com.