One-sentence definition:A block is a little list of transactions made online. Why it matters (2–3 sentences):Blocks matter since they are records of all the transactions made ever. Without a block, there would be no hash, and the entire blockchain would fall apart. Example (1 sentence):If there is alot of transactions, they all get recorded in … Read more

One-sentence definition: Proof of work is used in blockchain systems where miners must solve computationally difficult puzzles to validate transactions and create new blocks, making it costly to attack the network. Why it matters: It matters because it shows where work was done and no one lied about it. Without the PoW, thousands of fake … Read more