This document discusses the benefits of using the Erlang programming language and its Open Telecommunications Platform (OTP) for building reliable server applications and services. It highlights key aspects of Erlang such as process isolation, easy process spawning and supervision, lightweight virtual machine, and built-in tools for debugging and hot code loading. Erlang processes are similar to operating system processes and can fail independently without bringing down the whole system. The OTP framework in Erlang provides behaviors and tools for declaring restart rules to automatically recover from failures without operator intervention.