How to Disable Gutenberg and Use the Classic Editor in WordPress

WordPress released its latest version, 5.0 codenamed Bebo with a new default content editor called Gutenberg  a simple page builder and content editor with support for advanced features like adding classes, setting background images, column count, etc. And while Gutenberg is more efficient than its WordPress predecessor, not everyone is yet to make the switch just yet but most want to use WordPress 5.0 ???Bebo???.