This tutorial explains how to implement pagination and smart participant sorting in a video chat application using the Daily call object. The goal is to improve the user experience during large meetings by limiting the number of videos on the screen at any given time, reducing the load on individual users' CPUs and network bandwidth. The implementation involves adding a paginated grid component that displays participants with pagination enabled, managing participants and sorting their positions based on when they last spoke, and using a ParticipantProvider context to track participant state. The tutorial covers how to use the `useAspectGrid` hook to calculate the number of pages, tile dimensions, and visible participants, as well as how to sort participants based on their last active date using the `participantReducer`. The implementation is built using Next.js 11 and involves setting up a Daily account and repository, creating an environment variable for the API key, and cloning the repository.