The YAGNI principle advises developers not to implement functionality unless it is immediately required. It focuses on avoiding wasted effort and maintaining simplicity, ensuring that development resources are directed toward features that add real value.
Imagine a developer is creating a user profile system. Instead of adding complex features like social media integrations that might never be used, focus on delivering the essential features like editing personal details and uploading a profile picture.
Implement only what is necessary for the task at hand. By adhering to YAGNI, you save time and effort while keeping your codebase lean and maintainable.