To start making money with AdSense:
Apply and get accepted by Google’s AdSense program
File an IRS form W-9 (or other appropriate tax form) with Google
Generate AdSense for Content ad and link unit code for your site
Place the code in your pages
If you have a mobile site, add AdSense for Mobile units to the mobile site
Add AdSense search boxes to your site
Create a custom search results page that echoes the look and feel of your site
Create custom channels to track your ads and to offer targeted ad placements
Create custom palettes to complement your web designs
Add AdSense for Feeds to your syndication feeds
Aggregate your feeds from a single source such as a WordPress blog using FeedBurner
Add any parked domains you have to the AdSense for Domains program
Add video units to sites with appropriate content