Go to your Control panel, click on edit options, scroll down to Google AdSense Client ID and put your Client ID in the box, you can also put your channel ID in the channel ID box, to monitor the earnings from DP.
yepp it is free, however you need atleast 50 posts to take advantage of this feature. PS: Dude do you have any problem with singular notifications??
Here Some info on Channels - What are channels? Channels provide you with a way to view detailed reporting about the performance of your pages. By assigning a channel to any combination of pages, you can track a variety of metrics across your sites. Track your leaderboard performance versus the performance of your towers, or compare your motorcycle pages to your automobile pages, by assigning each group of pages to a specific channel and comparing results in your custom channel reports. You can even assign a channel to each of your separate domains, to see where your clicks are coming from. For more info visit- https://www.google.com/support/adse...ctx=en:search&query=Channel+ID&topic=0&type=f
The Web master Thanks for your wonderful help and accept in future also. Have a good luck for your business! Thanks a lot !!! DP Most