What does it mean to follow someone or a Page on Facebook
According to the Facebook Help Center, you automatically follow people who you’re friends with. You can also follow Pages (example: businesses, organizations, brands) and people who aren’t your friend on Facebook but allow everybody to follow them.
Some Pages and well-known public figures with large followings are verified by Facebook and have a blue badge next to their names to help you know that they’re who they claim to be. See: How to report a problem with Facebook | Step by step
How to Refollow people, page or group on Facebook
To refollow a person, Page or group from your News Feed preferences, do the following;
1. Open your Facebook account
2. Click on the V-like shape at the top right corner of any Facebook page
3. Click on News Feed preferences from the drop-down menu
4. Click Reconnect with people you unfollowed.
5. Select a person, Page or group.
How to follow a page or group directly on Facebook
To follow a Page or group directly on Facebook:
1. Click Liked (on a Page) or Joined (in a group) near their cover photo.
2. Select Follow.
To follow a person directly, click Follow near their cover photo.
That is how to refollow people you’ve unfollowed on Facebook.