edX is a leading online learning platform founded by Harvard University and MIT, offering free and paid courses across various disciplines. It provides learners with access to high-quality educational content from top institutions around the world, including universities like Stanford, Oxford, and Berkeley. With over 3,000 courses available, edX covers subjects ranging from computer science and engineering to business, humanities, and social sciences. Learners can earn certificates, pursue professional development, or even enroll in full degree programs. The platform is designed to make education accessible to everyone, allowing users to learn at their own pace and enhance their skills.