In the course WeChat Mini Program Development on Udacity, you will learn how to develop WeChat Mini Programs. The course begins with preparations, including downloading and installing the necessary developer tools and getting familiar with them. You will also learn how to use Git commands to view and switch between versions of your program. Next, you will create your first page using rpx as a unit of measurement. The course then covers data query and rendering, teaching you how to make API queries, parse and render data using callback functions, and implement the pull-down-to-refresh feature. You will also learn about using the onLoad function. The course continues with lessons on constructing lists, where you will use a loop to render weather forecast pages with pictures and lists. You will also learn how to create more pages, including using synchronous functions, implementing responsive buttons, and page redirection. Finally, the course covers location access, teaching you how to call the location service from OpenStreetMap and show different pages based on various circumstances using conditional rendering.