The talk is about Gleam, a programming language for building type-safe systems that can run on the Erlang VM and JavaScript targets. The speaker discusses three key points of Gleam: safety, performance, and friendliness. They explain various features of Gleam, such as variables, blocks, lists, custom types, case statements, and pattern matching. The talk also introduces Shimmer, a library built in Gleam for creating Discord bots. The speaker explains how Shimmer uses actors and the OTP package to handle events and messages from the Discord gateway. They provide code examples and explain the syntax used. The speaker concludes by mentioning the availability of documentation and the current progress of the Gleam language.