The hashrate measures the mining speed of your CPU per second, and the unit is hash/sec. Thus, miners put in resources to ensure their CPU attains the optimum hash rate since this helps them beat other miners to the quest, rewarding them better for verifying and adding blocks rapidly.
IYKYK
Short for “If you know, you know”. It implies that a message, post or information that’d make sense to the insiders but not the general public.