There are several types of VPNs,including:

VPN, or Virtual Private Network, is a technology used to secure internet connections over the internet. It allows users to transfer data, access content, or communicate over the internet without the need to deal with public Wi-Fi or traditional networks. A VPN expert is someone who specializes in creating, configuring, or managing VPNs. They might work on developing new VPN services, improving existing ones, or providing technical support to users.

1. Public VPNs: These allow users to access the internet over public Wi-Fi. Examples include Tor, OpenVPN, and NetNanny.

2. Private VPNs: These provide a secure, private network and are often used for browsing, streaming, or downloading content. Examples include OpenVPN, ZENVnet, and Vnetunet.

If you're looking for a VPN expert, you might consider working with a company that specializes in creating and configuring VPNs. You could also look into online communities or forums where experts share their knowledge and provide recommendations.