Updated 08/27/20: The third public beta is now available.
Apple has released a test version of watchOS 7 for public beta testers. The public beta is a pre-release version of the next Apple Watch operating system, which will be officially released this fall. The public beta gives users who are willing to try out beta software a chance to use the upcoming features of watchOS and the Apple Watch.
If you think you’re interested in installing the watchOS 7 beta, you should know that there are still bugs and other quirks being worked out. You can provide valuable feedback to Apple while using the beta, but you may also run into problems that could hinder your ability to use your Apple Watch.