This certainly looks cool, although its day-to-day usefulness is questionable.
It does not indicate that the app was specifically designed for that particular age, or if a certain level of skill is required to play the game or use the app.
You will find the content ratings on every app or game page. Safari is Apple's iconic super fast and elegant web browser for Mac.
Sites with a star in the corner denote those with new content.
If you're new to Safari, the first thing you'll notice is how clean it feels compared to many other browsers.
There are no annoying toolbars or plugins installed and the result of this is that Safari looks trim and loads pages very quickly.