Anytime you connect to a VPN service, the VPN will be able to see what sites you are visiting through the VPN. Conversely, when you have a secure connection through a VPN, your ISP will not be able to see any websites you connect to because all of the data will be encrypted between your device and the VPN server. However, if there are any VPN data leaks, particularly DNS leaks, this can expose your browsing history to third parties, even if you are using a VPN. This is why it's critical to periodically test your VPN for any issues or problems.