!!! Overview
[{$pagename}] ([GGC]) (Also called "edge nodes") represent the tier of [Google Network Infrastructure] closest to [End-User]. 

With [Google] [Edge-Nodes], [network] operators and [Internet Service Providers] ([ISP]) deploy [Google]-supplied servers inside their [network].

Static content that is very popular with the local host's user base, including [YouTube] and Google Play, is temporarily cached on edge nodes. Google's [network traffic] management systems direct user requests to an edge node that will provide the best experience.

In some locations, we also use our [{$pagename}] to support the delivery of other [Google] services, such as Google Search, by proxying traffic where it will deliver improved end-to-end performance for the end user.

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Google Infrastructure|https://peering.google.com/#/infrastructure|target='_blank'] - based on information obtained 2017-08-16-