Spotlight is Apple's built-in search system.
It started life on the Mac, but Spotlight quickly moved to the iPhone and then iPad as well. Over the years, Spotlight hasn't just gotten more knowledgeable in more areas, but its gotten smarter. Now, with Spotlight Suggestions, it can not only help you find the information already on your device, but it can help you find out about what's happening in the world around.
Full story from the iMore Blog...