Which action is least likely to help a user keep their geolocation private?

Using a public Wi-Fi connection is least likely to help a user keep their geolocation private because it often exposes users to greater risks. When connected to public Wi-Fi, users may unknowingly share their data with other users on the same network, making their information more vulnerable to interception by malicious actors. Additionally, many public Wi-Fi networks do not encrypt data, allowing for easier tracking of geolocation through various methods, such as IP address tracking or accessing location services on devices.

In contrast, disabling third-party cookies can prevent websites from tracking browsing activities and collecting specific data about locations. Using a VPN service helps mask the user's IP address, making it more difficult for anyone to pinpoint their exact geographical location. Regularly clearing the browser cache enhances privacy by removing stored information that could be used to track past activity and subsequently reveal geolocation. Thus, utilizing a public Wi-Fi connection does not offer the same level of privacy protection as the other options listed.