The introduction of the Watchlist feature on Pusher Channels offers a streamlined approach to managing online presence notifications at the application level rather than on a per-channel basis. This feature allows users to create personalized watchlists to receive online status updates for specific individuals, such as friends, followers, or colleagues, without being overwhelmed by irrelevant notifications. By utilizing Watchlist, users can maintain better connections in community-focused apps, social media platforms, collaboration tools, and multiplayer games by tracking the availability of relevant contacts. The system operates through an authentication process where users' identities and watchlists—arrays of user IDs representing their circle of interest—are verified by the application server. This enables users to receive notifications about the online or offline status of people they are interested in, enhancing the effectiveness of the feature by limiting the watchlist size to prevent notification fatigue. The new functionality builds on User Authentication and requires users' permission to be added to watchlists, ensuring privacy and control over connections.