Introduction to Ad Publishing

First of all what is ad publishing?
Well, this is a service which lets you to generate revenue from your website or blog. Advertisers put their ads in various formats on your site. Some advertisers will pay you for visitors clicks PPC or for number of views (impressions) CPM. There are other payment conditions as well.
The most popular are:
Pay-Per-Click (PPC) Advertising - advertiser pays a certain amount of money each time someone clicks on a small ad on a search engine's results page or homepage and is then taken to the advertiser's website.
Pay-Per-Impression aka Cost-Per-Thousand (CPM) (the M is derived from the Roman numeral for thousand) - The price an advertiser pays per thousand impressions (views).
Pay-Per-Lead (PPL) - Online advertising payment model in which payment is based solely based on qualifying leads.
Pay-Per-Sale (PPS) - Online advertising payment model in which payment is based solely based on qualifying sales.
If you have encountered some unknown term, the easiest way to find out is to check on the site like Marketing Terms
So, when you are familiar with basic stuff and have place where ads will be shown, you should pick suitable advertising solution. There is a really hot discussion about this topic here, on DigitalPoint Forums. Actually this can be your ultimate info seeking place.
Goodluck on finding your perfect ad solutions.