Install for Improvements to CarPlay
If you're an avid CarPlay user and you skipped iOS 13.4 and iOS 13.4.1, you'll probably want to install iOS 13.5 in the near future because you'll get some useful upgrades.
There were two new CarPlay features on board iOS 13.4 and both of them improved the CarPlay Dashboard experience.
If your phone is running iOS 13.4, iOS 13.4.1, or iOS 13.5, you'll get third-party navigation app support for the CarPlay Dashboard. That's a big deal for a lot of people.
In addition, you'll also see in-call information appear on the CarPlay Dashboard. It's a small change, but a useful one.