GH/s is the core metric of mining power, representing one billion hash calculations per second. Mining hardware has evolved from CPU to GPU to ASIC, with hash rate units progressing from H/s to EH/s. GH/s is in the middle range and is suitable for low-difficulty coins. The higher the hash rate, the greater the probability of mining a block, but mining profits are affected by electricity costs, difficulty adjustments, and other factors. Miners need to choose appropriate hardware and control costs to achieve profitability.