User Permissions –
A matter of trust
If it is your website and you wish to invite someone to write a blog, first you have to invite them by creating a user name and then allocating a permission or role.
Simply put, you are giving another person, who you should have a level of trust with, permission to contribute information to your website. This may be a member of your team, who knows how to look after the SEO on your site, or it could be someone who shares your interests and loves to write.
The Editor Role
The Editor role is a great choice for users who need permission to access all of the content, but not themes, plugins, or widgets. Editors can publish, edit, or delete any page or post, including those labeled “private”. They can also moderate comments and manage categories and links. In short, editors can do almost anything with content, but they can’t change any settings.
The Author Role
Authors can publish, edit, or delete their own posts, but they can’t access anything created by other users. They also can’t create, edit, or delete pages. Authors can upload files into the Media Library and delete anything they have previously uploaded. In addition, Authors can moderate comments on their own posts.
The Contributor Role
Contributors can write, edit, and delete their own unpublished posts, but their content must be reviewed and published by an Admin or Editor. It’s important to note that Contributors can’t access the Media Library, so if they want to use specific images, videos, or audio files in the Media Library, they have to ask for assistance from an Admin or Editor. The Contributor role is a popular option for guest authors who don’t submit content on a regular basis.
The team member or person you chose, can now log in to the dashboard by typing in the browser, www.yourwebsite.com.au/wp-admin . Type in their user name and copy paste the password that was issued to them, they will then be taken to the ‘dashboard’ or backend of wordpress.
This WP article has a detailed description of any more information you might need