How to tell the WordPress website that the maintenance work is going on.

If a website is under maintenance, how do you keep that website in maintenance mode for your audience? Viewers are informed that the maintenance work is underway while the banking website is running. If you have opened a WordPress website, how to show it to the audience while its maintenance work is underway. Using a plugin you can show the viewer the maintenance mode. Even after the website is open for a few days, You can also set a countdown time. If you have the admin power of the WordPress website, follow this video for more information.