Blockchain Academy
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GAS

When you create a transaction, you use resources on the Ethereum network, which is the concept of a "commission" that you pay for resource usage. The unit for measuring this fee is GAS and Ether is consumed to pay this fee. It is also a device in Ethereum's smart contract that uses malicious infinite loops to prevent resources from being wasted and excessive use of traffic. The gas consumed to run one code inside the Smart Contract or to make a one-time transfer is different, and the commission from the actual transaction can be calculated with GasPrice x GasLimit.

GasPrice is the price paid by the person requesting the transaction and GasLimit is an estimate of the total amount of gas to be consumed in the transaction. The commission generated will be given to the miner who has mined the block containing the transaction together with the reward. Since the miner classifies the transactions to be placed in blocks in the order of higher commission, it is better to set the Gas Price higher for faster transaction processing. If the gas price is less than the maximum transaction execution cost, the transaction will not be processed as a result, but the gas used when executing the transaction will not be returned to the user, so the appropriate gas price must be set.

https://ethgasstation.info/index.php

ETH Gas Station will help you set up your gas because it tells you the average gas price (It is expressed in gwei units.) and how fast you can send transactions with the gas price you set