What it means in plain language
URL is a structured address indicating the location of a resource on the Internet and how to access it.
Where it genuinely helps
A URL identifies a resource through scheme, host, path and optional query and fragment parts, each with a different purpose.
What to decide before acting
Treat addresses as stable contracts: never place secrets in them, limit parameters and plan redirects before change.
How to tell whether it works
Check encoding, letter case, duplicate parameters, canonicals, 404 logs and links to old structures.
