3Blue1Brown is a YouTube channel created by Grant Sanderson that focuses on explaining complex mathematical concepts in a visual and intuitive way. The channel covers a wide range of topics, including linear algebra, calculus, topology, and more. The videos often use animations and graphics to help illustrate the concepts being discussed. 3Blue1Brown has gained a large following for its engaging and insightful content, and Sanderson has been praised for his ability to make math accessible and enjoyable for viewers of all levels of experience. To explore the 3Blue1Brown is a YouTube, please visit their website at https://www.3blue1brown.com/