An entity is the canonical, deduplicated record for a person or company. Enrich the same person five times and you get one entity that links all five enrichments plus their event history — keyed on a stable dedup_key (LinkedIn URL, email, or domain).
Entity vs. enrichment. An enrichment is a single run — what you learned about someone at one point in time. An entity is the person/company itself, accumulating every enrichment and event. Use entities to look someone up; use enrichments to see a specific run.
Search matches a substring of the entity’s display_name or dedup_key — i.e. the canonical identity, not resolved fields.