Elasticsearch, known for its search capabilities, can also serve as a powerful analytics engine, especially when data is structured upon ingestion using the schema on write approach. This three-part blog series explores how to enhance Elasticsearch's near real-time analytics by structuring unstructured data with the Grok Processor during ingestion. By applying grok patterns to extract specific fields from unstructured data, users can create structured documents that leverage Elasticsearch's full analytical potential. Additionally, the blog discusses the benefits of aligning data with the Elastic Common Schema (ECS) for improved visualization and automated analysis, such as machine learning-based anomaly detection. The article provides practical examples of using grok patterns in ingest pipelines, demonstrating how to parse and structure data fields like IP addresses, HTTP request methods, and more, to enable efficient analytics. It also highlights the ease of converting grok patterns between Elasticsearch's ingest node and Logstash, offering flexibility in data processing workflows.