Genesis Block Definition: The first or initial block in a cryptocurrency is called the Genesis Block, which starts the process and is not mined. Once the Genesis block is established, a series of blocks are built into a blockchain that stores information that includes details of transactions and unique information.
As the blockchain expands, with one layer built over another, the Genesis Block is considered the foundation of the sequence. The numerous layers built from the original block in the chain are one of the reasons why the cryptocurrency is secure for users. The Genesis Block is considered the template or starting point for all other blocks in a blockchain.