With speculation that Apple intends to create its own Google-replacing search engine, it seems to be a good time to focus on a few of the more powerful things Spotlight can already do for you on both Mac and iOS devices.
Learn to make the most of Spotlight
Command-Space to invoke Spotlight is the single most useful command on your Mac. It can help you find almost anything on your Mac or online.
Want to open an app? Tap Command-Space and begin typing the app name until it appears, then press Return to launch the app. Want to open a document? Begin typing its name until you find it in the Documents view.