Introduction Importing data into Power BI is only the beginning of the analytics process. A dashboard is only as reliable as the data model behind it. Poorly organized tables and incorrect relationships can lead to inaccurate calculations, duplicate values, and misleading reports.
Source: [Dev.to](https://dev.to/feddy_mwanjumwa_e4047cf0c/understanding-schemas-relationships-and-data-modeling-in-power-bi-4144)