As mentioned, transactions cost gas to execute. Simple transfer transactions require 21000 units of Gas.
An Ethereum transaction refers to an action initiated by an externally-owned account, in other words an account managed by a human, not a contract. For example, if Bob sends Alice 1 ETH, Bob's account must be debited and Alice's must be credited. This state-changing action takes place within a transaction.
Transactions, which change the state of the EVM, need to be broadcast to the whole network.
Transactions require a fee and must be included in a validated block.
Glasp is a social web highlighter that people can highlight and organize quotes and thoughts from the web, and access other like-minded people’s learning.