What is civ6 game speed?

Civilization VI has several game speeds that can be selected at the start of a game:

1. Online: This is the fastest game speed where all actions happen instantly
2. Quick: This is the next fastest game speed where everything progresses at a slightly slower pace
3. Standard: This is the default game speed where the game progresses at a moderate pace
4. Epic: This game speed is slower than standard, but faster than marathon
5. Marathon: This is the slowest game speed where everything progresses at a very slow pace

The game speed affects how quickly things happen in the game, including research, production, science, culture, and more. The various speeds can significantly change the gameplay experience and the time it takes to complete a game.