Registration Form Widget supports several actions that can be performed after a successful registration.
These actions can be found at Edit Registration Form, and click Content > Action After Register.

Let us learn how to use them!
1. Email Notifications#
The email notification option can be used to send post-registration emails to new users, as well as new user notifications to the site administrator and the user who has registered with the necessary details.


2. Redirect#
Redirect option can be used to redirect the user to a welcome page or admin page after successful registration.

3. Auto-Login after Registration#
Auto-login after registration options log in the new users to the site once the registration is completed. The user is redirected to the page set in WordPress’s settings as per their user roles.
Hope this helps!