Cash concentration is the transfer of funds from diverse account

Deposit account

A deposit account is a current account, savings account, or other type of bank account, at a banking institution that allows money to be deposited and withdrawn by the account holder. These transactions are recorded on the bank's books, and the resulting balance is recorded as a liability for the...

s into a central account to improve the efficiency of cash management

Cash management

In United States banking, cash management, or treasury management, is a marketing term for certain services offered primarily to larger business customers...

. The consolidation of cash into a single account allows a company to maintain smaller cash balances overall, and to identify excess cash available for short term investments.
The cash available in different bank accounts are pooled into a master account.The advantages of cash concentration are
1) Cash control
2) Cash visibility

For example, you have 2 bank accounts (i.e. Rizabank and Bank Islam). For each of these bank accounts, you set a minimum of RM10,000. In the actual account, it appears Rizabank has RM15,000 while Bank Islam has RM20,000. The difference RM5,000 (from Rizabank) and RM10,000 (from Bank Islam) will be transferred to Bank Account C. This increases the possibility of using the surplus for other uses.