To me inflation is a negative word so I consider it to be harmful. But in other hand we were thought in school that a creeping  inflation can help drive economic growth.

The soul aim of inflation is decreasing purchasing power or devaluation of it currency in relation to price of goods which make is hard for the common man to survive.

A times the government manipulate the economy inflation to keep the people in poverty, for instance, a government worker might be earning #50,000 and the cost of his living is #40,000 the day the government increase his salary to #70,000 you'll see that his cost of living will increase to #60,000 immediately and i began to wonder while the value of money remains the same but it purchasing power fall drastically.
So I don't really think inflation is necessary, because it is a big disadvantage to the common man.