Note: This is a simple search facility. It's not Google, so it will not display any related search terms or content. 

Search Title - This is displayed above the site each form

Search Button Text - This is the copy displayed in the form button next to the search field.

Search Within Path - This lets you limit your search results. Everywhere will search pages from across your whole site. Beneath this page limits the results to only this part of the site tree and below, while Beneath another page lets you pick which area of the site to search by hand.

Results page - the search block displays results in the same area it displays the form. If you're adding search to a sidebar or header navigation, this is a problem. You can create a blank page somewhere else with a search block on it, and use it as a search results page. Simply pick that page you've setup as the target for Post to Another Page Elsewhere. The results will display on that new page wherever you put the empty search block.