SiteGround is a web hosting provider. Its job is to run the server that holds your website so that you do not have to. You choose a plan, install WordPress or upload a site, and SiteGround looks after the operating system, the web server, PHP versions, SSL certificates, caching and routine security updates. In practice it replaces the combination of a raw server, a systems administrator and a pile of plugins that many small businesses would otherwise assemble themselves.
The product is built around Site Tools, SiteGround's own control panel. Unlike the account-centric cPanel used by many hosts, Site Tools is organised per website, which means caching, backups, email accounts, SSL, cron jobs, staging and database access for each site sit together. That design is aimed at owners and small teams rather than developers, and it is why the platform feels more guided than a generic hosting account.
The service runs on Google Cloud infrastructure with SiteGround's own speed and security technology layered on top, including server-level caching (SuperCacher), NGINX direct delivery and a constantly updated web application firewall. Shared plans are named StartUp, GrowBig and GoGeek; above them sit managed cloud plans (Jump Start, Business, Business Plus and Super Power) for sites that need dedicated CPU, RAM and storage rather than shared resources.
What SiteGround is not matters just as much. It is not an unmanaged VPS or a cloud platform where you hold root access and configure the stack yourself — that is Cloudways territory. It is also not a premium WordPress-only platform with edge caching and advanced workflow tooling at the level of Kinsta or WP Engine. UK Business Stack classifies SiteGround as the managed hosting layer for small sites: it sits underneath everything the business does online and is chosen for reliability, support and ease rather than for maximum configurability.