What capability does the Power BI Service primarily provide for report sharing?

The primary capability of the Power BI Service in terms of report sharing is collaboration and sharing. This feature allows users to easily share reports and dashboards with other individuals or groups within their organization. The Power BI Service facilitates collaboration by enabling users to comment directly on reports, receive notifications about changes, and work on data together, enhancing team productivity and decision-making processes.

In contrast, advanced analytics, data transformation and cleaning, and visual customization options, while important aspects of Power BI, do not focus on the essence of report sharing. Advanced analytics pertains to the in-depth analysis of data, data transformation and cleaning relate to the preparation of data for visualization, and visual customization options allow for modifying the appearance of reports but do not directly address the sharing aspect. Thus, while all these features play significant roles in the overall functionality of Power BI, collaboration and sharing is the key capability that the Power BI Service primarily provides when it comes to report sharing.