Who Are Followers on Twitter?
New Followers refer to the list of users who have recently followed you.
How To Find The Latest Followers?
You can view the list of these users by selecting the option of 'New Followers' under the Tracking criterion in the left column in the Audience section. This will list down all the latest user profiles who have followed you. You may follow/unfollow these profiles by clicking on the corresponding button shown in the user profile card.