Have you ever observed that while browsing some websites in Internet Explorer, your address bar turns green? It is due the verification certificate possessed by the website in question. Verisign is one of the companies which authenticates websites. If a website has a valid security certificate, it is marked as green. Try checking out this website https://www.microsoft.com/en-us/ in Internet Explorer. And tell me what do you observe?
You would see that as the website loads, the address bar is green.
And once you click on the address bar, one could view the security certificate.
It’s a great way for a client to gain the trust from a user to visit their website.