Website administrators need to periodically maintain websites. On WordPress websites, administrators would regularly perform maintenance tasks such as update the WordPress core, update plugins etc. It is advisable that website administrators put the site on maintenance mode so that visitors are informed and also to prevent any transactions happening during the maintenance mode that can disrupt or break something.
In this short demo, we will be using a WordPress WP Maintenance Mode plugin to achieve the task. There are several plugins available for WordPress platform. We advise that you check them out, check the ratings and reviews, and use whatever plugin that suits your need.