Why capital gains are classified as short-term and long-term?

​​The taxability of capital gain depends on the nature of gain, i.e. whether short-term or long-term. Hence to determine the taxability, capital gains are classified into short-term capital gain and long-term capital gain. In other words, the tax rates for long-term capital gain and short-term capital gain are different. Similarly, computation provisions are different for long-term capital gains and short-term capital gains.​