UUIDs Explained Simply (and Why Every Developer Needs Them)

When building modern applications, one problem shows up everywhere: How do I uniquely identify data across systems? That’s where UUIDs (Universally Unique Identifiers) come in. What is a UUID? A UUID is a 128-bit unique identifier used to identify information in distributed systems. Example: 550e8400-e29b-41d4-a716-446655440000 It looks random - and that’s the point. Why UUIDs are Important Traditional IDs (like auto-increment integers) have limitations: Predictable Not secure Hard to scale acro