Docker is an emerging platform that allows developers to build and deploy software using lightweight, pared-down virtual machines known as containers. The platform provides easy-to-provision recipes for developers and bit-for-bit compatibility between environments, making it a popular solution for continuous delivery in modern infrastructure. Datadog has integrated with Docker, allowing users to monitor containers by running the Datadog Agent on the host machine or using a "dockerized" version of the Agent that runs all software in containers. The integration provides tags-based monitoring, which enables users to track specific metrics for many containers in aggregate and create graphs to visualize this data. Additionally, Datadog's alerts feature allows users to define multi-alerts that span clusters of containers, making it easier to monitor large numbers of containers efficiently. Users can also explore Docker metrics using the Metrics Explorer and apply search filters to find specific events or metrics.