Additionally, without adding to your contacts, you can subscribe to user updates by clicking on the Follow button of the user card. A subscription means that you will always be aware of all changes that occur with this member of the platform.

You can view the users you are subscribed to in the Following tab. Here you can go to the page of each such participant and see information about it.
You can also view the number of users who have subscribed to you on your personal profile page — Followers. Unfortunately, you only see the number — you can’t go to view information about such users.