It is very useful if you want that your website users can submit posts from the site without going to the WordPress back-end.
For Front-end Access Of post form, we have a shortcode [GUEST_POST_FORM role="author"]
In this shortcode, you need to pass a user role who can submit a post from the front-end.
Another shortcode is [GUEST_POST_LIST type="guest_post" number=10 status="publish"].
This shortcode is used for list post with pagination.