Go to Settings › Streaks.

SettingWhat it does
Enable streaks & badgesTurn the feature on or off
Streak saversHow many savers each person gets a month (default 1). People use them themselves on a missed working day
VisibilityShow streaks to everyone on the team (on by default)
ReminderA nudge when nothing has been tracked yet

Admins and managers can see Team streaks for their teams.

Streaks and badges settings
Team streaks