When they announced Swarm, several of the most popular features, such as mayorship and the leaderboards, were removed from Foursquare. When you had the most check-ins within 60 days, you were considered the mayor of that venue until someone bumped you. Checking into a venue would earn you points, an easy way to compete with your friends and family.
When check-ins were removed from Foursquare, many users were upset and curious as to the reason…why? While Foursquare didn’t really have one, some users, like myself adapted for a little while and then lost interest. Some users stopped using the service altogether. Some users stuck it out and still use the service to this day.
Now Foursquare has brought both of these features back in Swarm. However, it did lose all of its information on mayorship, so you will have to start all over again.