Spotlight does all kinds of great stuff. OS X Daily points out that you can use it to quickly look at a web page.
If you’ve gone to a website using Safari, you can simply type the URL into Safari, scroll down to the bookmarks section, and you’ll see a live preview of the site. It’s a handy way to check in on a site without ever opening up that distraction of a web browser.
View Live Webpage Previews in Spotlight on Mac OS X [OS X Daily]