When you click Publish in Power BI Desktop, a multi-step process unfolds in the Power BI Service that most developers never see. The PBIX file is decomposed into separate cloud assets: the semantic model (containing data, relationships, and DAX measures) and the report (visuals, pages, filters, themes). Metadata is registered for governance and lineage, data source connections are validated, credentials are stored securely, and scheduled refresh is made available for Import mode models. Security roles are applied so different users see only authorized data, and the report becomes shareable across Teams, mobile, and embedded apps. Every user interaction then generates live queries against the semantic model rather than static snapshots. Understanding this architecture helps developers troubleshoot refresh failures, design reusable datasets, and build scalable enterprise BI solutions.
