One-sentence definition:
A Hash is an algorithm that verifies that a block is valid.
Why it matters:
A hash is important because it verifies the integrity of the block. Without it, the mining system wouldn’t work.
Example:
In a block in the blockchain, every block needs a number to verify it.
Links (internal):
- Basics post: What is a hash and why does it matter?
- Related glossary term: Proof of work