SHA 256
In plain terms
A widely-used cryptographic hash producing a 256-bit digest.
Going deeper
SHA-256 generates a fixed fingerprint of data that's practically impossible to reverse or forge, used for integrity and verification. It's part of the SHA-2 family.
Under the hood
One-way and collision-resistant; used for integrity, signatures, and blockchain, but too fast for raw password storage.
Examples
File integrity, digital signatures, Bitcoin, certificates, checksums.
Think of it like...
Like a unique tamper-evident fingerprint for any file or message.