To activate the Paramount Network for your Roku, here are the guidelines:
1-Once the channel is downloaded for your account, power on your Computer.
2-Now use the mouse and click it to open the Google Chrome Browser.
3-Then, type in the URL bar as "paramountnetwork.com/activate".
4-Tap the enter key, and you shall be directed to a website
5-There, you have to enter the activation code
6-Subsequently, click the continue option
7-Finally, the channel shall get activated
Do not forget to create a new identity for the Paramount Network app. It is the sole way to access the content you need.