For buyers contracting authority
The line that decides 72415000 is operation versus creation. Choose it when the contract keeps a website running, hosting the platform, managing the content system, handling uptime and support. If the main deliverable is a newly designed or rebuilt site, that is World wide web site design services (72413000) instead.
Many real contracts blur the two: they ask one supplier to redesign a site and then host and maintain it for several years. Where a tender bundles build and run, set the primary CPV code by the dominant deliverable over the contract term, which for a multi-year hosting and support deal points here.
Two other neighbours matter. Application service providers (72416000) is the pick when the authority rents a hosted application rather than operating its own website. Internet service providers (72411000) covers connectivity, not site operation.