Quick definition · 2 min Internet & web term
OAuth
OAuth is the “Log in with Google” system: it lets one app access another on your behalf without sharing your password.
Think of it like
A valet key. It opens the car to park it, but cannot open the glovebox. Limited, revocable access.
Example
When an app says “Continue with Google,” OAuth grants it just the access you approve, and you can revoke it later.
Why it matters
OAuth is everywhere you sign in with another account. Knowing it is delegated, limited access is reassuring and useful.
Where you’ll see it
GoogleGitHubevery login button