In what way can users protect their geolocation data when using various online services?

Disabling location permissions for all apps is an effective way to protect geolocation data because it directly prevents applications from accessing and using the user's geographic information. When location permissions are turned off, even apps that might need the user's location for specific functionalities cannot collect or share that data. This proactive measure helps safeguard against potential privacy breaches and unauthorized tracking, as many applications collect location information to enhance their services or for advertising purposes.

In contrast, enabling location services on all apps would increase exposure to geolocation tracking, and not sharing any personal data online does not address geolocation specifically. Regularly changing usernames may enhance security to some degree but has no bearing on location data protection.