Posting on someone's "wall"?

Jthanmyfitnesspal

Someone I don't know just "posted on my wall." What does this mean for this platform? Who can see it, for example?

Lietchi

Your wall is your Community profile. Who can see it depends on your Community privacy settings, I think. At the moment it's public, I can see three messages: https://community.myfitnesspal.com/en/profile/1000915402/Jthanmyfitnesspal