Gas price - How does it works?

This might depend on the blockchain used.

For example in Ethereum exact price of the gas is determined by supply and demand between the network's miners, who can decline to process a transaction if the gas price does not meet their threshold, and users of the network who seek processing power. However, ETH has gas fees are really high.

Polygon's MATIC gas fees are far cheaper than Ethereum.

Along with this, Polygon’s finality time enables the completion of a transaction in 2.3 seconds. On Ethereum, only six transactions can be completed in one minute.

https://support.polygonscan.com/support/solutions/articles/69000793833-what-is-gas-fee-%E2%9B%BD#:~:text=In%20conclusion%2C%20Gas%20Fee%20%3D%20Gas%20Price%20x%20Gas%20Limit.

finality time enables the completion