How Does the Concept of ‘Block Space’ Limit the Number of Transactions Included?
Each blockchain has a maximum block size or a maximum Gas Limit per block, which defines the total capacity for transactions in a single block. Since transactions vary in size and computational complexity (Gas usage), this limit caps the total number that can be included.
This scarcity of 'block space' is the primary driver of the fee market, as users must compete for inclusion.