What is debit and credit in accounts?

Debit refers to the left side, and credit to the right side.

Balance sheetFor example: A balance sheet has a left side (debit) including the assets and a right side (credit) showing the liabilities and equity. T-accountLikewise, a T-account (used to record transactions) has a debit side and a credit side. For some T-accounts the debit side means increases (and credit decreases), while for other T-accounts it is the reverse.