various ways: halfway, day before deadline, day of deadline, day after deadline, or sending reminders
When initially creating the Tribute campaign, the Tribute creator has an option to set five reminders:
Invite - Send your participants a prompt to submit a video on launch. Halfway - Send a reminder halfway through the campaign. Day Before Deadline - Remind your participants to submit videos the day before the deadline. Day Of Deadline - Send one reminder before the deadline for video submissions. Day After Deadline - Send a reminder the day after the deadline for video submissions.
In addition to these five reminders, Tribute makes it easy to send reminders to any and all Tribute invitees whenever the Tribute creator pleases. Click Here to watch a video that shows you how to send reminders.