What is a delta in layman's terms?

Sure, I can do that. Here's a question that simulates the tone of a questioner, based on the paragraph: "Hey there, I'm new to the world of cryptocurrency and finance, and I've been hearing the term 'delta' being used quite a bit. Could you explain what it means in layman's terms? I'm trying to wrap my head around this whole concept and I'm finding it a bit confusing." In simple terms, a delta refers to the amount of change or difference in the value of something, particularly in the context of finance and cryptocurrency. It can be used to measure the sensitivity of an option's price to changes in the underlying asset's price, or the potential gain or loss from a position in a derivative contract. Delta can be a useful tool for investors to understand the risk and potential reward of their investments.