Content Delivery Network
Many online services use a content distribution network (CDN) to deliver photos and other files as fast as possible. This improves site speed, which is a metric used by Google and other search engines as a ranking signal for search results.
This works by keeping copies of commonly used photos and files simultaneously hosted at several data centers (nodes) around the world.
Those photos and files are delivered by the node closest to the shopper, decreasing the distance they have to travel, thus making the site load faster. In this way, your store loads just as fast in Asia as it does in North America.
Currently, BigCommerce has CDN nodes in London, Los Angeles, New York, Sydney, Tokyo, Sao Paulo, Hong Kong and Singapore.
We recommend taking advantage of the BigCommerce CDN if you want to customize your store's design. See Referencing Assets in a Theme for proper format and syntax.