The document discusses MuleSoft ESB, an integration platform that connects applications across different platforms and technologies. It introduces MuleSoft ESB and when an ESB is appropriate to use, such as when integrating 3 or more applications that use different communication protocols. MuleSoft ESB provides intelligent message routing, data mapping, orchestration, security and scalability. It can integrate both on-premise and cloud applications using out-of-the-box connectors. MuleSoft ESB applications are developed and configured using Anypoint Studio, an Eclipse-based graphical editor.