The 'abc-csv' gem is a Ruby library that provides a simple and efficient way to generate CSV files. Its core feature is its ease of use, which allows users to quickly and easily export data to CSV format with just a few lines of code. The gem is designed to streamline the process of CSV generation, making it accessible to developers of all levels. It also includes an alphabetical ordering feature, which makes it easy to sort data in CSV files by column in alphabetical order. This feature adds an extra level of organization to exported data, making it easy to read and use. With its focus on simplicity and functionality, the 'abc-csv' gem is a valuable tool for anyone who needs to work with CSV files in their Ruby projects.