This tutorial series aims to help developers build video and audio apps quickly using SvelteKit and Daily's JavaScript API. The focus is on providing a fully customizable UI, including both video and text-based chat. To accomplish this, the app uses Daily's call object, which allows for easy integration with various front-end frameworks. The tutorial covers how to initialize a call, render media for participants, provide device control options, and implement screen sharing. It also discusses how to handle device permission errors and add chat messaging in future posts.