FDIC deposit insurance protects bank customers in the event that an FDIC-insured depository institution fails. Bank customers don't need to purchase deposit insurance; it is automatic for any deposit account opened at an FDIC-insured bank. Deposits are insured up to at least $250,000 per depositor, per FDIC-insured bank, per ownership category.
For more information on deposit insurance coverage and the level of protections that the insurance affords, please visit the FDIC.gov