Custom Search Engine

The Custom Search Engine is the platform that powers AdSense for search. Both products allow publishers to create a search engine for their site and earn revenue from the ads on the search results page. However, Custom Search Engine offers additional advanced features. Learn more about how CSE differs from AdSense for search.
If you already have an existing AdSense account, we recommend that you create all your search engines in AdSense for search and only go to the CSE page to access advanced features.
If you have existing CSEs that you would like to monetize, you'll need to link your existing CSEs to AdSense.

edit a search engine I've already created

Once you create and save your search engine, you can easily go back to edit the settings. Simply follow the instructions below:

1. Sign in to your AdSense account.
2. Select the AdSense Setup tab.
3. Choose the Manage ads sub-tab.
4. Find the name of your search engine in the list of AdSense units.
5. Click the related edit link and change the desired settings.
6. Save your updates.

Most changes will automatically be visible on your site wherever that search engine appears. There's no need to update your search code unless you've made changes to the look and feel of your search box, your site encoding or language preferences, or whether your results pages will be hosted on your own site or a Google-hosted page.

AdSense for search

AdSense for search is now powered by Custom Search, meaning publishers have more advanced customization options for their search results and ads. Options include keyword tuning, vertical search, and selecting the placement of ads on search results pages.

For more information, visit http://www.google.com/afs .