IT'S ABOUT TIME I TRIED TO EXPLAIN WHAT PROGRESSIVE ENHANCEMENT ACTUALLY IS

Summary from the TLDR Web Dev newsletter

Progressive enhancement is a design and development principle where a website is built in layers, starting with a solid baseline experience for all users and progressively adding enhancements based on browser capabilities. This approach prioritizes functionality and accessibility for all users, regardless of their device or browser, and uses JavaScript as an enhancement rather than a requirement. This is the opposite of graceful degradation, where a "perfect" experience is designed and then broken down for less capable browsers, potentially resulting in a broken user interface.