The Geolocation API lets you access the user's current location from within your web app, allowing you to build features like maps, nearby recommendations, or location-based reminders. When you use the Geolocation API, you always need to consider user privacy and security. Browsers require explicit user permission before sharing any location data with a website. This ensures that users are aware of when and how their location is being accessed, and can choose to allow or deny the request.

You can request the user's current location using the navigator.geolocation.getCurrentPosition() method. If the user grants permission, the browser provides latitude and longitude coordinates. If permission is denied or if there's an error (for example, if the device cannot determine the location), an error callback is triggered. Always inform users why you need their location and handle possible errors gracefully.