What is a YouTube handle?
A YouTube handle is a new way for people to find you and connect with you. Unlike channel names, handles are unique to each creator, making it easier for you to establish a distinct presence on YouTube.
Handles & channel URLs
Your new handle will become a part of your channel URL. In most cases, your personalized URL will become your handle. You can use your handle to direct people to your channel when they’re not on YouTube. For example, if your handle is @user123, your channel URL will be https://youtube.com/@user123
Your existing channel URL(s) will continue to work