The search integration is an internally used integration by the Home Assistant Core.

All data stored in Home Assistant is interconnected, making it a graph. This means it can be searched as a graph.

This integration allows the internals of Home Assistant to search for relations between things like areas, devices, entities, configuration entries, scenes, scripts and automations.

Currently these relations are displayed on the “Related” tab in more info dialogs, and on Device info pages.

The search integration is automatically loaded with the Home Assistant frontend and does not need to be configured separately.