The change log for Chrome 58.0.3029.81 is ten thousand items long, so you might want to think twice before clicking that link. It’s probably safe to say that there are no new features or major changes in the new version, since nothing of the kind is mentioned in the release announcement. This is an important update, though. That’s because it includes fixes for twenty-nine security flaws.
Chrome seems to update itself on most computers within a day or so of a new release, but you can usually trigger an update by opening the browser’s menu (the three-vertical-dots icon at the top right) and navigating to Help > About Google Chrome.