The SuperHash client is used for mining Bitcoin (BTC).
Running it on a computer the player owns will tie up that computer, generating a small amount of money over time. Unlike other tasks, this one will endlessly repeat. It's ideal to have a computer that is dedicated to performing this task, although the player can interrupt it to use the computer to test a customer component, if necessary.
A more powerful computer will generate BTC at a higher rate. Both the CPU and the graphics card(s) are important. For mining, CPU cores are more important than the frequency.