User registration plugin

1. How do I use user registration plugin in WordPress?
2. What is user registration system?

How do I use user registration plugin in WordPress?

Simply head over to the Settings » General page in your WordPress admin area. Scroll down to the 'Membership' section and check the box next to 'Anyone can register' option. Next you need to select the default user role. This is the user role assigned to each new user who registers on your website.

What is user registration system?

A registered user is a user of a website, program, or other systems who has previously registered. Registered users normally provide some sort of credentials (such as a username or e-mail address, and a password) to the system in order to prove their identity: this is known as logging in.