End time reminder is a message that Standuply sends you before the report is over in order to remind you that it's time to answer the bot's questions or hurry you up.
This is how the end time reminder default settings look like
You can customize the time interval between the reminder message and the end of the report by clicking the left field and selecting one of these three options
You can customize the reminder message itself by clicking the right field and entering any other text, for example
You can also turn this feature off by uncheking the "End time reminder" feature