Safari has been Apple's Web browser for many years, and the company keeps making improvements to it at regular intervals. Originally designed to be a Web browser with the Mac OS look and feel, Safari has been part of the Apple family a long time. Apple support isn't the only reason to use it, though; it has other strengths.
With the latest releases, you can do many tasks that used to require multiple apps or a lot of keystrokes. For example, you can send a tweet or post content to Facebook from within Safari. If you visit a site on your MacBook or iMac and have iCloud integration, the same page can be pushed to your iPhone or iPad so you don't have to look for it twice. There's a private-browsing feature that hides your tracks, too. In the recent versions of Safari there aren't separate search and URL fields; there's one text-entry area and Safari figures out what you want. Autofill and smart-search options suggest Web sites before you've typed the entire URL. There's support for multiple browser windows with thumbnail overviews, with quick zooming in and out.
While the era of radical changes to Web browsers has gone by, small improvements that help navigation and cut down on keystrokes are always welcome. Safari has always been the standard browser of Mac users, and by continuing to develop its product, Apple has kept it that way. The latest version of Safari continues that tradition.