Hi there,

You can find a detailed description of how the playthrough works here:
All about online no deposit casino, poker, and bingo bonuses

Briefly, the playthrough amount is the value of wagers you will need to place before you are eligible to make a withdrawal.

For example, if a $10 bonus has a playthrough of 10x, you will need to play $100 in bets before you can be eligible to cashout.

Please let me know if you have any other questions.

Thanks,
NDN