3-Pack is the common three-result version of Google’s local pack.
It matters because local buyers often make decisions quickly from maps, reviews, proximity, and location-specific pages. Local SEO connects online visibility to real-world calls, visits, appointments, and service inquiries.
Example
A search can show three local businesses in a map-based result group. The ‘3-pack’ describes that presentation; it is not a promise that the same three businesses appear for every user or every local query.