CDN stands for Content Delivery Network, and it refers to a system of distributed servers that helps to improve the performance, speed, and availability of websites and other online resources.
A CDN works by caching website content on multiple servers located in various geographic locations, making it easier and faster for users to access the content by serving it from a server closest to them.
In WordPress, CDNs can be used to serve static content such as images, stylesheets, and JavaScript files. Offloading the delivery of these resources to a CDN can help to reduce the load on the website’s server, improve the website’s speed and performance, and reduce the risk of downtime or slow loading times caused by high traffic.
Many popular CDN services are available for use with WordPress, including Cloudflare, Amazon CloudFront, and MaxCDN.