Google AdSense blog reports, that they’ve integrated Custom Search Engine (CSE) into AdSense for search, so you can take advantage of CSE's most popular features without having to leave your AdSense account.
Here are some of the new features:
- Site Search: Now you can choose to provide just site search so users can find all the information they're looking for on your site, and you can host the search results on your own pages so that they can find that information without leaving your site.
- Improved indexing of your pages: With improved indexing technology, you can provide a more enhanced Site Search experience for your users. AdSense for search will now index even more pages of your site, as long as we’re able to crawl them, so that your users will see more results from your site in your AdSense for search results.
- Vertical search: You can also allow your users to search across multiple sites - this could be a network of sites that you own or other related sites that you think your users might find useful.