These settings will run automatically by giving time duration to perform operations.
Hour of day to perform automatic operations : It will perform operations automatically according to hours fixing.
Auto send reminder after (days) : If you set days , after that days completed the reminder automatically send to the customer.
Tasks Reminder Notification Before : If you set number of days, accordingly tasks reminder notification will be send.
Enable Task Reminders : If yes task reminder will be show to opposite person vice-versa.
Task Reminders means Quotes task.
They perform the actions when we enable those fields. Otherwise, it won’t perform any action.