A lot of business accounts sign up to activate Rich Pins which adds a few additional features when people pin from you site. When you are signed up for this th

A lot of business accounts sign up to activate Rich Pins which adds a few additional features when people pin from you site. When you are signed up for this they will scrape the page the pinned image comes from to collect some extra info on the page to show along with the pin. I’m not sure how if they do this if you are not signed up for Rich Pins though.