You as a team leader or manager can define how often these retrospectives need to be sent out. Some teams require members to update their profiles every month, some every quarter and so on. The MuchSkills settings makes it flexible for teams to automate these reminders for the entire organisation or per department.
To find the retrospective settings, go to your TEAM SETTINGS page and look for the MANAGE RETROS tab.
Watch this video to learn more about retrospectives.