Continue building a full-stack MERN (MongoDB, Express, React, Node.js) application in this second part of a comprehensive tutorial series. Dive into advanced features such as creating, updating, and deleting posts, implementing like functionality, and enhancing mobile responsiveness. Learn to debug common issues, work with action constants, and set up environmental variables for your project. Conclude by deploying your fully functional "Memories" social media application, allowing users to share and interact with interesting life events. Gain hands-on experience in full-stack development while creating a real-world project from start to finish.