How do I implement user activity feeds and social interactions in my web application?
To implement user activity feeds and social interactions in your web application, you can follow these steps: 1) Choose the right technology stack, such as Node.js for backend and React.js for frontend; 2) Design a database schema to store user activities and relationships between users; 3) Create API endpoints for user actions like posting, commenting, and liking; 4) Use real-time communication protocols like WebSockets for instant updates; 5) Implement a notification system to keep users informed about interactions; 6) Consider using existing libraries or services like Firebase or Stream for easier implementation.