How much is one step?

I'm curious, could you please clarify for me - when we talk about progress or advancements, what exactly constitutes one step? Is it a measurable unit, or more of a subjective term? And if it's measurable, how do we quantify it? I'm eager to understand the nuances of this phrase as it relates to various contexts, from personal growth to technological advancements in the cryptocurrency and finance sectors. Your insights would be greatly appreciated.