Roles
Out of the box, these are the 5 roles available for users from least permissions to most permissions:
Subscriber: Can only leave comments.
Contributor: Can submit posts but cannot publish.
Author: Can write posts but only edit their own posts, can moderate comments for their own posts.
Editor: Cannot create users, can write/edit/approve all posts, comment moderation, cannot change any of the blog configurations.
Administrator: Can do everything, no limits
Here is a good video explaining these roles :
https://wordpresstraining.com/videos/blogging/wordpress-user-roles-explained/