It’s short for "satoshis," named in honor of Satoshi Nakamoto, the creator (or group of creators) of Bitcoin.
1 bitcoin (BTC) = 100,000,000 sats
Satoshis work a lot like cents for a dollar (or euro): they allow Bitcoin to be split into fractions, making it more accessible.
For example: 👉 0.00005000 BTC = 5,000 sats
It’s easier to read, easier to understand, and much more practical for making payments or tracking your investments.