To endorse the check, you'll just have to flip it over and sign the line with the x to the left of it. This line will be found at the top of the check, and you'll sign it sideways. Do this right before you go to the ATM or the bank, so that your check cannot be cashed if you lose it. If you don't endorse the check, that makes it harder for the bank to accept it from a person who wants to cash it for ulterior motives.
FDIC insured means that the government will give you your money back (up to $100,000) in case your bank goes out of business and can't pay you. If you have more than $100,000 to put into savings, try spreading it out over several FDIC banks with no more than $100,000 in each account.
Understanding Deposit Insurance. The Federal Deposit Insurance Corporation (FDIC) is an independent agency of the United States government that protects the funds depositors place in banks and savings associations. FDIC insurance is backed by the full faith and credit of the United States government. Since the FDIC was established in 1933, no depositor has lost a penny of FDIC-insured funds. FDIC insurance covers all deposit accounts, including: