If you are using a recent version of Chrome with Windows or MacOS, you should be good to go. To use Chrome with Web Bluetooth on Linux will require a little more preparation. If you visit the dashboard at https://adafruit-webbt-playground.glitch.me/ and see a message stating that Web Bluetooth is not supported, this is how to fix it.
In the address bar for Chrome, type chrome://flags and press enter. This will take you to the internal Chrome flags settings. In the search box, type in enable-experimental-web-platform-features and you should see only one result.
Change disabled to enabled and click the Relaunch button.
That's it! You should be ready to go.