What is URI? Can someone explain it in simple terms? or What is URI and how is it different from a UR

You’re spot on! what is uri? It’s the granddaddy of URLs and URNs.

URLs are directional ("go here"), URNs are nominal ("this is it"). Example:
- URL: `ftp://files.example.com`
- URN: `urn:oid:1.2.3.4`

Why care? Web standards (RFC 3986) rely on URIs. Devs use ’em in HTTP requests, APIs, etc.

For testing, Insomnia (insomnia.rest) is great for playing with URIs.