"Group activity" menu option allows you to view Top Walkers, Challenges, Compare Teams and Friends.
Shows your ranking and the top 10 walkers in your company.
If your company has a challenge occurring, it will show up here under the Challenge type category.
If your company has Teams created, they will show up here.
You can compare your steps to your friends. To add a friend, click on the + symbol. To compare friends, select compare friends tab and select the friends you want to compare steps for.