For buyers contracting authority
The line to hold with 48825000 is the one between a server and a service. This code is for the web-serving infrastructure itself: the machine or platform that hosts and serves sites and applications. It is not the code for paying a provider to run or build the website itself.
That boundary trips authorities constantly. A contract to host and operate a website as an ongoing managed service belongs under World wide web (www) site operation host services (72415000), and site design or development belongs under 72413000, even though both sit close to a web server in everyday language. Reserve 48825000 for when the web-serving capacity, not the outsourced service wrapped around it, is the thing being procured.
Up the tree, general-purpose machines without a web-serving purpose belong under Computer servers (48822000) or the parent Servers (48820000). Where a tender bundles a web server into a broader infrastructure or hosting deal, set the primary CPV code by the dominant deliverable rather than by the presence of a web tier.