The site maintenance section allows a user to control whether the information for the website should be currently on or off-line. Reasons for making a website offline would be normal maintenance purposes, or even the initial building phase.
This section also allows the Drupal users to choose a message for their visitors to read upon arrival when the site is off-line.
It is important to update your CMS software, including Drupal, to keep your website safe, secure and so that it can continue to function correctly. Click the link below for further details on keeping Drupal up to date!