Clock setting "Give more time"?

Hi everybody!

I just came across the setting "Give more time" under the "Chess clock" preferences. I could not find any information about that.
Can anyone please explain what this means?

Thank you!

On the right of the chess board there is a small + button. If you click on it once it will add 15 seconds to the time of your opponent.
The purpose of this feature is for situations when both sides are enjoying the game but time is running out so they agree on giving additional time to each other to keep the game alive.
Another situation could be time odds games, where a player plays with less time than the opponent.

In the lichess there is a button which gives +15 seconds to the opponents clock when pressed, you can chose in the settings to remove this button, either in all games or in rated games.