Spotlight Search helps you find items in your website quickly. You can search in 9 areas such as Articles, Modules, etc. If you install some common extensions like K2, EasyBlog and VirtueMart, you will be provided with results from those components as well. Just copy the title then paste it into the Spotlight Search box and you get instant access to settings page.
You can set the number of Search Results to be displayed and Search Coverages in the Configuration page. In the field "Search Result Number", input the number of items you want to show (default is 10). In search coverages, drag and drop to re-arrange the search coverages or uncheck the ones that you don't want to be searched. Please watch the video below for more details.