A Deposit Match Bonus is a percentage bonus on casino credits you purchase up to a maximum value. For example: a 200% match bonus on a deposit of up to $100 could earn you an additional $200 credited to your casino account after you've made the first deposit. You advised to read the bonus terms and conditions on the particular casino's website.
To get the most out of your bonus you should deposit the maximum amount.
One hour is on the house!