The blockchain produces blocks automatically when the block size is achieved. The transactions are stored until the file is complete since the block is a file. They’re connected in such a way that the most current block is linked to the one before it. To identify a block, a hash value is generated using a mathematical formula. It also displays any changes made to a block.
Bitcoin blocks are usually created from the transactions pending and awaiting processing (that is what miners do) except on occasion miners have (for some strange reason) mined empty blocks. The transactions are gathered into a block and the miner attempts to run a hashing algorithm upon the data that results in a hash with a certain number of leading zeroes (this hindrance is known as the ‘difficulty”).