An cent account in online forex trading, is like any other trading account except the fact that the account balances are displayed in cents.
For example, when you deposit $10 to a cent account, it will be displayed as 1000 cents.
This allows you to be able to open more trades from small amounts of deposit. For instance;
In a normal $10 account with 1:100 leverage, a trade of 0.01 lot will use a margin of $10 meaning you can only have one trade open at any one time.
In a cent account on the other hand, the same trade will use only 10 cents of margin out of the 1000 usd cents(10usd) so you can have 100 trades open at the same time.
One good broker that offers cent accounts is Exness.