I have a niche-focused website (Online travel guide to the cities of Asia), with reasonable traffic, and I was thinking about selling advertising space in it.
I noticed that leading travel websites sell advertising space in the form of CPM (a certain cost @ 1,000 exposures of the ad) and wanted to ask you:
1. What is the best way/method to sell advertising space in a website ?
2. How do you go about it (Technically... What software do you have to install to count the exposures and deduct the necessary money from the client's account)
3. Are there any international internet-advertising-agencies that deal with it ?