Google Maps can tell you how busy a business is and estimate wait times using aggregate anonymous data from users who have opted into the Google Maps Timeline feature. By tracking device density in specific venues, the platform determines current crowd levels using typical traffic patterns as a benchmark. The system calculates popular times and wait durations by analyzing historical visitor patterns from the previous few weeks.

Google Maps displays a graph indicating when businesses are likely to be slow or have queues. Visit duration metrics help users plan outings to venues like museums, while wait time estimates are ideal for fitting service-based businesses into tight itineraries. The platform also calculates how busy entire areas are, which benefits those attending outdoor events.

Users can tap the "Busy area" label to see charts of peak times and directories of nearby businesses. This data is derived from anonymous user contributions and is never used to reveal individual identities or exact headcounts. The feature is typically limited to high-traffic zones like tourist towns or festival locations, as Google requires sufficient visitor data to provide accurate information.

Before opting into Google Timeline, users should note that the feature enables continuous activity tracking, which also assists Waze and Google Maps in tracking traffic patterns to help find optimal driving routes.