In google search site, you can put a google search box on your website which you have created. Then enable to the visitors and customers to find information instantly from your website.
Steps to host the search solution enables from google site search:
1. Increase the website conversions and sales
2. Reduce the support cost by enhancing self service
3. Display ads-free search results
4. Customize search box and results using xml
5. Optional Google branding
6. Flexible pricing model based on search queries