What does it mean if someone is following you?
Also, if you add friends, you will see their progress, such as, How much experience they made today, or the other month, or up to the total number of experience.
If you log out of your account and go on your profile, you should be able to see.
All of your followers are displayed on your profile page along with who you're following.
By the way, if you look under another person's comment, you can see a "Reply" button to the right of the upvote/downvote arrows. Use that to directly message someone.