What is scp?

Soo evryone has telled me about monsters that is calling scps dose somebody know about that

SCP - Secure Contain Protect. Simple, useful and useless at one time.

It's the bets thing, there are anormal entities and they have like power etc pretty fun

SCP is short for Secure.Contain.Protect. SCP's are objects, lifeforms, etc. possesing specialabilities or being a threat(For instance SCP 173 being able to snap necks while being a statue only moving when not in direct line of sight, or 079 which is reffered to as "Old AI")