Drush often serves as a utility knife for Drupal developers. It can be used to set up drupal, maintain it and deploy it.
Drush is a command line shell and Unix scripting interface for Drupal. It runs update.php, executes SQL queries, runs content migrations, along with utilities such as cron or cache rebuild.
The word Drush is a combination of two words: Drupal + Shell. A shell is a command line tool for simplifying the management of websites by writing commands.
Why Use Drush
Here are the main advantages of using Drush: