Maintenance mode wordpress plugin lets you display a Maintenance message on your wordpress blog. It is very helpful when you are editing your theme or configuring your wordpress blog. It’s obviously better than showing your readers your errors and messy codes.
Visitors will see a message like “Maintenance Mode – SITE is currently undergoing scheduled maintenance. Please try back in 60 minutes. Sorry for the inconvenience.”
The maintenance mode wordpress plugin adds a splash page to your blog that lets visitors know your blog is down for maintenance. You can also customize the above message for your visitors and let them know if you’re doing some enhancements and in how much time your blog will be back
You can download the maintenance mode wordpress plugin from here