font_awesome_5_rails is font awesome 5 gem bundled for rails asset pipeline
The Font Awesome 5 RailsGem versionFA5 provides Font-Awesome5 web fonts, stylesheets, and javascripts as a Rails engine for use with the asset pipeline. It offers backwards compatibility with the font-awesome-rails gem, focusing only on Free icons from Font Awesome.
Ruby on Rails, often referred to as Rails, is an open-source web application framework written in Ruby. Known for its convention over configuration and don't repeat yourself (DRY) principles, Rails simplifies and accelerates the development of database-backed web applications.