What feature does Datadog offer to visualize metric data over time?

Datadog provides the capability to create custom dashboards, which are highly effective for visualizing metric data over time. With custom dashboards, users can select various metrics and configure different types of visualizations such as time series graphs, bar charts, and heatmaps. This functionality allows users to tailor the dashboard according to their specific needs, focusing on metrics that are most relevant to their monitoring goals.

Moreover, these dashboards can be designed to refresh in real-time or at specified intervals, ensuring that users are always looking at the most current data available. This capability is especially beneficial for teams that need to quickly understand trends, identify anomalies, or track performance against key performance indicators (KPIs).

In contrast, static reports do not allow for real-time data visualization and lack the interactivity that custom dashboards provide. Batch processing tools and random sampling tools are not specifically designed to visualize metrics over time and are typically related to data processing rather than presentation. Therefore, custom dashboards stand out as the feature that best meets the need for dynamic and personalized metric visualization.