MPC stands for "multi-party computing" and in essence it means that in order for a transaction to be signed, several different parties are required to participate.
Multi-party computation (MPC) wallets offer a unique way to store crypto safely. Secret keys are divided in parts and each party holds a piece. None of the single parties can complete a transaction without the others.
Your Deblock crypto wallet is an MPC wallet, which brings an additional layer of security to your assets.