If a bonus needs to be wagered 30 times, this means that you have to stake the received bonus amount a total of 30 times. So, if ₹1,000 is received as a bonus, wagering 30 times would mean playing for a total of ₹30,000. Do note that if the bonus was received from a deposit, it may be that the wagering requirement also applies to the deposited amount and not only to the received bonus.