This document discusses Apache Pulsar and Go client development in Apache Pulsar. It provides an introduction to Apache Pulsar, including its history and community. It then summarizes what Apache Pulsar is and its key features like flexible messaging, multi-tenancy, geo-replication, and cloud-native architecture. The document also discusses using the Go client in Apache Pulsar, noting that CGO is not an extension of Go and can impact performance, and provides tips for using CGO carefully. Finally, it describes how to join the Apache Pulsar community through mailing lists, GitHub, Slack, and WeChat.