A server is the always-on computer that stores your website and delivers it to visitors. When someone visits your site, your server does the work of sending them the pages.
Also known as: Web server, hosting server
In plain English
A server is just a computer that never sleeps, sitting in a data center somewhere, whose job is to answer requests. When someone types your address, their browser asks your server for the pages, and your server sends them back.
Why it matters for your business
Your server's speed and health set the ceiling for how fast your site can ever be - no amount of optimization beats a slow or overloaded server. Server problems (outages, resource limits, bad configuration) are behind most unexplained slowdowns and crashes.
When you'll run into it
When choosing hosting, when a site suddenly slows down or goes down, or when errors mention resources like memory or CPU.
Run into this on your site?
WordPress Hosting