A Reply list shows actions made by other users concerning your Air Tags and your Profile.
The following actions will be shown on your Reply list:

• When another user comments on an Air Tag you posted
• When another user puts an Air Tag you posted in his/her pocket
• When another user puts your profile in his/her pocket
• When another user starts following you

If another user has just browsed any of your Air Tags or your profile, his/her actions will not be shown on your reply list.