Udemy: specific skills on a budget, buy individually, own permanently. Check 4.5+ stars, 10k+ students, recent reviews. LinkedIn Learning: professional development, $40/mo or free with library card, completed courses show on LinkedIn profile. Coursera: university-level credentials, 300+ university partners, Google Career Certificates are employer-recognized. Choose: specific skill + tight budget = Udemy. Corporate career + LinkedIn = LinkedIn Learning. Employer/academic credential = Coursera. Check your library for free LinkedIn Learning first.