To activate your key on Ubisoft Connect, please follow the steps below:

1. Launch Ubisoft Connect and log into your account
2. Click on the menu icon with the three horizontal lines in the upper left corner:

3. Click on "Activate a key"

4. Enter your key in the activation window.

5. Make sure the key is entered correctly and confirm by clicking \"Activate\"
6. Done!

After successfully redeeming the key the game gets activated and permanently bound to your Ubisoft Connect account.
It then can be found and downloaded within your Ubisoft Connect library at any time.