Google Maps utilises the data it gathers when people use their service to track and follow your location, interests, businesses and other places you visit, gleaning insights about your behavior.
There are other, excellent alternatives that are far more privacy-preserving.
Mapbox is a location data platform for websites. It is highly intrusive, collecting IP addresses, timestamps, location data, front-facing camera data, accelerometer data, and more from end users.
Nextzen is a Mapzen-based project aimed at extending its support. It enables developers to build their own maps. When using their service directly, they do collect location data, but only share it with third parties as aggregated, de-identified data, but otherwise do not share with third-parties.