This tutorial demonstrates how to integrate the Contentful live preview SDK into a Next.js blog, enabling content editors to see changes in real-time as they edit content within the same window. The process involves setting up a new content preview, adding the live preview SDK to the project, initializing it in the `_app` file, and integrating it with the `pages/posts/[slug].js` file. Additionally, the tutorial covers the use of inspector mode, which allows editors to locate and edit specific fields directly from live preview, and debug mode for troubleshooting potential issues. The integration enables a smoother content editing process, reduces errors, and improves collaboration between editors and developers.