The Bitcoin Difficulty Chart shows how hard it is for miners to solve the math puzzles required to add new transactions to the blockchain. In simpler terms, it tracks how much computer power is needed to mine Bitcoin at any given time.
This difficulty changes roughly every two weeks (or after 2016 blocks) to make sure Bitcoin blocks are created consistently, about every 10 minutes. When more people start mining and the total computing power increases, the difficulty goes up to keep mining steady. If fewer people are mining and there’s less computing power, the difficulty goes down.
Think of it like adjusting the weight on a balance scale to keep things even—it ensures the Bitcoin system stays predictable and secure. The chart lets you see these changes over time, helping miners and enthusiasts understand how challenging mining is at any point.