The bbc.com/tvcode portal enables users to activate BBC iPlayer and BBC Sounds on smart TVs and streaming devices, allowing access to personalized features like watchlists and recommendations. Users sign in by entering a unique six-digit code displayed on their TV into the official web portal on a separate device. For instructions and to activate your device, visit BBC iPlayer Help . How do I sign in on my TV? - BBC
This method is designed to make logging in easier, as typing long email addresses and passwords using a standard TV remote control can be difficult. https://www.bbc.com/tvcode
Based on the URL provided, here is the text explanation of what that link is for. The bbc
When you attempt to sign in to BBC iPlayer on your TV, the app will display a temporary code and prompt you to visit this URL on a separate device (like a smartphone, tablet, or computer). How do I sign in on my TV
The URL is the official web portal used to sign in to the BBC iPlayer application on television devices (such as Smart TVs, streaming sticks like Amazon Fire TV or Roku, and game consoles).