Apple this week released the fourth iOS 11 beta to the general public and the fifth build to developers. iPhone and iPad owners who are part of the beta program can update now by navigating to Settings > General > Software Update. You can learn how to join Apple's beta program here.
Apple's Beta Software Program allows iPhone, iPad, Apple TV and Apple Watch owners the ability to test-drive pre-release software before its official release. While it can be fun to get the newest iOS features before everyone else, early betas can feature annoying bugs. iPhone and iPad owners should make sure they really want the new software before installing, or wait for later builds.
iOS 11 includes a ton new features such as a resigned Control Center that can be customized, a new iPad dock, a new voice for Siri and more. You can see a complete list here or visit Apple's preview page.
iOS 11 will be released alongside the rumored iPhone 8 and possible iPhone 7s sometime in September.