Categories allow a user to divide its content into different sections. Different topics publishing on a single website can be divided into different groups. It tells a reader what a post is about and they can easily find their content from a lot.

WordPress provides you an option to change category into tag and tag into a category. For this, you need to install Categories and Tags Converter from Import option under Tools section.

With the help of tags, similar posts can be grouped. Hence, it makes more comfortable for the users to search for a particular post. Tags are similar to categories but still different.

WordPress Categories are broad-ranging. It helps a user to identify about a blog. It is possible for a post to have more than one category. A post must have at least one category.

WordPress Tags are like categories, but they are used to describe a post more specifically. Tags are not necessary for every post.

WordPress user role determines access permission to the users of a WordPress site.

• Administrator: They have full rights over a site.
• Editor: They deal with the content section of a website.
• Author: They only deal with their posts. They can delete their post even after publishing.
• Contributor: A contributor doesn't have the right to publish their post or page. They need to send it to the administrator for review.
• Subscriber: Users who are subscribed to your site can log in and update their profile.
• Follower: They don't have any right. They can only read and comment on your post.
• Viewer: They can only read and comment on a post.

With the help of a WordPress theme, you can design the layout and appearance of your website in the front-end.

WordPress theme should complement your site. It can be either free or paid. An ideal theme should have qualities like simple, responsive, supports plugins, SEO friendly.

Custom themes are very straightforward to format. You don't need much technical knowledge to change in the coding part. The custom theme allows for SEO search, but with an SEO plugin available it would not make much difference to a normal theme.

Free and premium WordPress themes are different in many ways. With free themes, you have to compromise with the quality as many other sites using the same theme. Problems in premium themes solved more quickly than in free themes.

WordPress plugins are programs written in PHP scripting language that extends the functionality or add some new features to a WordPress site. They provide additional functions to an application.