Microsoft Teams is a web-based collaboration platform that can be accessed through a web browser Chrome, Firefox, Edge, or Safari.

This means that you can use Microsoft Teams without downloading or installing any additional software on your computer or mobile device.

However, you can also download and install the Microsoft Teams desktop or mobile app to access additional features and functionalities.

Use Microsoft Teams Online

1. Open a web browser such as Google Chrome, Mozilla Firefox, or Microsoft Edge.
2. Go to the Microsoft Teams website at https://teams.microsoft.com/
3. Click on the "Sign In" button located in the top right corner of the screen.
4. Enter your Microsoft account email address and password.
5. If prompted, select "Stay signed in" to remain logged in to Teams.
6. Once you have signed in, you will be taken to the Microsoft Teams web app, which includes many of the same features as the desktop and mobile versions of Teams.

Note that some features may be limited in the web app, and you may need to download the desktop or mobile app to access certain features or functionality.