A Power BI consultant uses the many data connections available in Power BI to combine data from various sources. In order to import data into Power BI's data model, they establish connections with databases, cloud services, APIs, and flat files. They clean, transform, and aggregate data from these many sources into a single format using Power Query. To ensure easy data integration, Power BI developers then establish linkages between various datasets. As a result, stakeholders can access and analyze data from several sources inside a single Power BI dashboard, facilitating thorough analysis and reporting.