Temporarily storing copies of frequently requested content closer to the people or applications using it.
Content delivery networks cache images, videos, webpages, and other files on geographically distributed edge servers. This reduces the distance the content must travel and allows it to load more quickly.
Cached content remains on an edge server for a defined period or while it continues to be requested. The CDN returns to the origin store when content is missing, expired, or needs to be refreshed.