Elasticsearch, widely recognized for its search capabilities, is also a robust analytics engine that can be harnessed to analyze data and generate custom dashboards with near real-time responses. This article introduces developers to the use of Elasticsearch's aggregation features, which allow for data analysis by summarizing datasets rather than focusing on individual documents. By leveraging the same Lucene indices used for search, aggregations can produce immediate updates as data changes, offering advantages over traditional batch processing systems. The article provides a practical walkthrough using the New York City Traffic Incident dataset to demonstrate how aggregations can categorize data into buckets based on criteria such as boroughs and time, and calculate metrics like the total number of cyclist injuries. This developer-centric approach emphasizes the flexibility and efficiency of combining multiple aggregations in a single API call to create comprehensive reports, setting the stage for more advanced topics in subsequent articles.