To curb inflation is to reduce the rate at which the value of currency goes down. When inflation rates are high, prices of goods tend to increase more quickly. Curbing inflation is therefore beneficial to a country's economy.
When inflation is running high, the money in peoples' pockets quickly loses value. This means that currency that people have today is able to buy more things now than later. In the future, this currency is worth less even if the value printed on it stays the same because it cannot be used to buy as many things anymore. The longer today's money is able to keep its value, the better. This is why all governments worldwide strive to curb inflation rates.