Since I started blogging, I have not opted to add Google Search for my blogs to increase my earnings. I thought it was not a good alternative to earn more. Instead, I only added blog search forms intended only for inside site searches.
Last June 1, I checked my Adsense earnings and was glad to see the first Optimization Tip message from Google itself. It said:
Dear Publisher,
Here is your optimization report for the month of June. After an automatic review of your sites, we think you might be able to improve your monetization using the following tips:
Adsense for Search adds both functionality and revenue to your site.
You are not currently using Adsense for Search on your sites.
We hope these tips are helpful, and encourage you to experiment using different layouts and formats–no two sites monetize the same way!
Sincerely,
Google Adsense
Google recently improved Google Adsense Search, which is now powered by Google Custom Search to help your visitors find what they’re looking for.
Aside from additional Adsense earnings, putting a Google search on your website has other advantages. It enhances your visitors online experience. It enables them to search for inside pages (of your site) and outside pages directly from your site without having to open another browser. Additionally, now powered by Google Custom Search, it gives more relevant results for your visitors.
However, the results given for in-site searches (pages within your sites) are those indexed pages only. Google advises to submit a Sitemap using your Webmaster Tools dashboard to get crawled and indexed.