Block is a number of transactions that have been confirmed and shared in the Bitcoin public ledger. Initially able to accommodate up to 36MB. But to reduce ddos attacks on the network, then it is limited to 1MB.

With this limitation, miners can mine Bitcoin up to 1MB. Blocks larger than 1MB means invalid. So why is this maximum limit needed?

- To maintain consensus
- Avoid Centralization of Pool
- Make Full Nodes More Worthy