P5.js is a JavaScript library designed to make coding accessible for artists, designers, and beginners. It simplifies the process of creating graphics and interactive content for the web, allowing users to focus on their creative ideas rather than complex programming concepts. The library provides a user-friendly environment where users can draw shapes, animate objects, and respond to user inputs. With its emphasis on visual output, P5.js encourages experimentation and exploration in coding, making it a popular choice for educational purposes and creative projects.