Why does my product page URL redirect with a strange string?

When we open a product page from our website it intially loads the assigned url, however almost instantly once the link loads it changed to url to have a strange string or variable at the end. This only occurs on our product pages and not on collection, blog, or home pages. Any help will be greatly appreaciated.

Example below:

https://www.rustysoffroad.com/products/rustys-jt-gladiator-4-advanced-kit

changes to

https://www.rustysoffroad.com/products/rustys-jt-gladiator-4-advanced-kit#.Yv5bZnbMK00

The # .Yv5bZnbMK00 portion will change once the page is refreshed or revisted.