Advantages
It is an open source platform and available for free.

CSS files can be modified according to the design as per users need.

There are many plugins and templates available for free. Users can customize the various plugins as per their need.

It is very easy to edit the content as it uses WYSIWYG editor (What You See Is What You Get is a user interface that allows the user to directly manipulate the layout of document without having a layout command).

Media files can be uploaded easily and quickly.

It offers several SEO tools which makes on-site SEO simple.

Customization is easy according to the user's needs.

It allows creating different roles for users for website such as admin, author, editor and contributor.

Disadvantages
Using several plugins can make the website heavy to load and run.

PHP knowledge is required to make modifications or changes in the WordPress website.

Sometimes software needs to be updated to keep the WordPress up-to-date with the current browsers and mobile devices. Updating WordPress version leads to loss of data, so a backup copy of the website is required.

Modifying and formatting the graphic images and tables is difficult.