Logstash is a widely-used open-source log monitoring and management platform, particularly popular within the ELK Stack, offering a sophisticated processing pipeline with three stages: inputs, filters, and outputs, each customizable with plugins. With the latest version 2.1.0, Logstash has introduced improvements like enhanced shutdown capabilities and offline plugin installation. Input plugins such as File, Lumberjack, Beats, and TCP facilitate event ingestion, while filter plugins like Grok, GEOIP, Multiline, KV, and Date allow for extensive data manipulation and parsing. Output plugins, including Redis and Kafka, enable event data distribution to specific destinations. Logstash's plugin architecture empowers users to tailor their data processing workflows efficiently, with codecs providing data encoding and decoding options. Despite some challenges, many issues can be mitigated by utilizing available plugins, making Logstash a robust solution for log data management.