Enabling Site Search allows your visitors to search your site's content by keyword or phrases. Here's how to do it...
STEP 1 - From your Dashboard, select "Site Details" next to the website you would like like to add search to.
STEP 2 - Click "Edit" in the Site Details window.
STEP 3 - Scroll down to "Enable Site Search" and click "Yes". Be sure to Save your changes.
STEP 4 - Once enabled, you will now see a magnifying glass icon and "Search" as the last item in your navigation. Clicking on this will allow your site visitors to enter a keyword or phrase to search.