Blockchain fees or gas fees refer to the fees paid to miners to incentivize them to pick up transactions and add it to their block before it is hashed. These fees fluctuate based on the demand and supply of the blockspace in the network. During bull markets, gas fees can skyrocket.
This chart helps you bring clarity on which blockchains have levied the greatest fees. It’s important to view fees as a percentage of overall volume otherwise the metric is useless. So if you hover anywhere on the chart you can see the fees as a percentage of volume.