This patch provides a replacement for the deprecated Google Image Charts service that Magento uses for all 2.x instances and replaces it with the Image-Charts free service.
Users of Magento 2.x deployments will not be able to view static charts in Magento 2.x instances unless they download and apply this patch.
See Switch from deprecated Google Image Charts to Image-Charts for Magento for more information.
(This patch is also known as MAGETWO-98833.)