Getting started with Google Custom Search is actually incredibly easy, but it’s something that many marketers are still missing. The tool is a great way to help make the Internet a little bit smaller, so if you’re hoping to simply search for something on a particular domain, specific page, or on a particular topic, a Google custom search makes that happen.
For those who are unfamiliar, it’s essentially a search bar that you can add to your website to help ensure that your visitors are searching within your website.
from Blogger http://evangelinagius.blogspot.com/2015/01/google-custom-search-will-boost-your-seo.html
Evangelina Gius 