Earn money through Pay Per Click and Internet traffic

My friend Richard happened to see my blog site and asked me:
' Why your blog site so many advertisement? '
I believe he is new to this because he does not even know what is blog?
I started blogging on this site since 14th oct 2007.
After one month of blogging, a blogger suggested to me to apply for adsence programme that relevant advertisement will be placed on my blog pages and i will earn revenues [ Coffee money ]whenever readers click on my goggle advertisements, so call Pay Per Click.
After that, i applied for the adsence programme and the application was approved on 10th Dec 2007, the next day the advertisement could be seen on my blog pages.
Since 11th Dec 2007 until now , about 2 month, i observe the following:
1. More page view will generate more revenues due to more click on advertisement.
2. Interesting topics will attract more readers.
The key point is if i really want to be a blogger who can really earn big, i have to fullfill the following:
Qualiy blog---It is really important to write blogs with good quality contents which then can detain repeated readers.
Internet traffic---If my blog site has no internet traffic, then who is going to click my advertisement.
This is my little thought about Pay Per Pay and Internet traffic.