Serve & Protect missions are optional Secondary Objectives that offer great XP rewards. This Where To Find Serve & Protect Crime Locations For RoboCop Rogue City lists all of the locations of each of the Serve & Protect Crimes so you can quickly find the public in trouble, and help them out of the situation.
All of the Serve and Protect missions happen on the Downtown map. You visit the map several times in the story and each time you visit, there is a new wave of Search and Protect missions you can complete. The missions are called Serve & Protect 1, 2, and 3, depending on whether you’re visiting for the first, second, or third time. These are really quick and easy to do and give you a good amount of experience points at the end of each mission, so it’s really worth it