Kotlin is a programming language introduced by JetBrains. JetBrains is the official designer of the most intelligent Java IDE, named Intellij IDEA. Kotlin runs on JVM and can be used anywhere Java is used today.
Kotlin is compatible with Java. It is widely used to develop android applications. It is a general-purpose, statically typed, and open-source programming language.
Kotlin is easy to learn, especially if you already know Java (it is 100% compatible with Java).
Kotlin is used to develop Android apps, server side apps, and much more.
Google announced Kotlin as an official language for android development.