How to display confirmation messages, error or warning to the user is something every theme and/or Magento 2 extension developer should know about. There are four types of notification messages you can use: Error (in red), Notice (yellow), Success (green) and Warning (in grey). Getting your module to display notifications in Magento 2 is different than in Magento 1, since there are no more session class specific notification messages. If you need your module to display messages via Magento notification system,...