Wait

The Wait block pauses the flow execution for a specified amount of time. This is useful for creating delays, rate limiting, or scheduling actions to occur after a certain period.

Waits of up to 5 seconds happen within the current run. Longer waits, up to 30 days, end the current run and continue the flow when the time is up, so they survive restarts. A few things behave differently after a long wait:

Discord only accepts responses to a command or button for 15 minutes. After a longer wait, response blocks fail, so send a message to the channel instead. Kite acknowledges the interaction before the wait starts, so Discord doesn't show it as failed.
Inside a loop, waits always happen within the current run, so they're limited by its 30 second execution time.
Blocks in other branches of the flow don't wait. If a block has two branches and only one contains a long wait, the other branch runs right away.
An Error Handler around the Wait block still catches errors of the blocks after it.
If you delete the Wait block while a flow is waiting in it, the flow won't continue.
A single run can wait longer than 5 seconds at most 10 times in a row, so a Wait block in a cycle can't keep it going forever. Each button click or modal submission starts counting again, so menus can be used indefinitely.
An app can have at most 1000 flows waiting at the same time.