Hello Chuck,
A VPN service does the following: A virtual private network extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.
It will essentially route your network traffic through another computer. While Life lock offers Identity protection & insurance to reimburse you if your identity is compromised, as well as a VPN solution. More of what they offer are listed below.
Lifelock
WE SCAN & ALERT†
If we detect a potential threat to your identity, we alert you by text, email, phone, or mobile app.
WE DEFEND
We help block hackers from stealing personal information on your devices, and our VPN helps keep your online activity private.
WE RESOLVE
If you become a victim of identity theft, one of our U.S.-based agents will work to fix it.
WE REIMBURSE
We’ll reimburse funds stolen due to identity theft up to the limit of your plan.
It really depends on your needs and online security, if you have had Identity issues in the past then the choice would be Life lock, however, if you really only need VPN services then you can’t go wrong with Express VPN.
I hope that answers your question.