What is meant by Finalization of Accounts?

Accounts Finalization means i.e. preparation of trial balance (i.e closing balance of all ledger), Trading, P & L Account, And Balance Sheet. These accounts should be perfect and accurate.

that's called final account not finalization of accounts...

Accounts Finalization means preparation of accounts with accurate figures & arriving at the accurate profit or loss incurred. Normally an account is prepared by an accountant & finalised by a senior accountant or Auditor/Chartered Accountant.

After trading account a final account is prepared and the transformation of the accounts from trading to profit & loss account it is called finalizing of accounts.