Chart.js is a popular open-source JavaScript library that provides flexible and responsive charts for web applications. Coursera's Chart.js skill catalogue teaches you how to visualize data effectively using dynamic charts and graphs on web platforms. You will learn how to create, customize, and integrate different types of charts like line, bar, pie, doughnut, and more using Chart.js. This includes understanding the methods and properties of Chart.js, designing visually appealing charts, manipulating data, and implementing interactivity in charts. As a learner, you'll strengthen your skills in data visualization, web development, and JavaScript programming, enabling you to present data in a more engaging and understandable way in your professional field.