A unique identifier, like the address for your home. It helps navigate the traffic between computers as each has its own address.
It's good to know that some of the click bait which gets my attention is connected to a sketchy web site. I need the re-affirmation that I have ignored my common sense
It works very well ... I like it no telling how many times they have saved my computer from crash and burn and it also alerts you of suspicious sites ... love it and it is reasonably priced.
it works- I used to have stuff happen about twice a year- uardio warns me any time something looks fishy
John Robert Fleming