Cloud hosting primarily refers to elastic web server cluster networks that can scale automatically according to the web traffic and synchronize state changes between cluster nodes. Cloud hosting can also refer to data center operations at scale which support millions of simultaneous users at a time. Web hosting companies take the latest innovation from cloud data centers and introduce them on the retail level to shared server customers for better website performance.
Most retail cloud hosting accounts priced in the $3 to $12 p/mo range are based on a combination of network load balancing, low density hardware, high performance servers, SSD storage, platform virtualization, advanced caching integration for websites, scalable system resources, stack snapshots, and support for PHP 7, HHVM, HTTP/2, CDNs, etc. These companies are making the advances from "big data" and enterprise IT data centers available as PaaS/SaaS/IaaS plans.