Ruby is a dynamic, open-source programming language known for its simplicity and productivity. It was created in the mid-1990s by Yukihiro Matsumoto, who aimed to make programming more enjoyable and accessible. Ruby's syntax is clean and easy to read, making it a popular choice for beginners and experienced developers alike. One of Ruby's most notable features is the Ruby on Rails framework, which simplifies web application development. This framework allows developers to build robust applications quickly by following the convention over configuration principle. Overall, Ruby is valued for its flexibility and strong community support.