Alternatively, you can navigate to https://teams.microsoft.com and sign in.
Download and install the Teams desktop app for your Apple, PC, or laptop computer. The app is free to download and has a few more features than using a web browser.
You may also choose to get the Teams mobile app for iOS and Android. Just download the app, login, and you're all set. Be sure to set your preferences for the notification levels you want in the app settings.