How is a Power BI dataset defined?

A Power BI dataset is defined as a collection of data that can be used for creating reports and dashboards. This definition highlights the core function of a dataset within the Power BI environment, as it serves as the foundation upon which visualizations are built. A dataset typically consists of data imported from various sources, which can include structured data from databases or unstructured data from cloud services.

Once the dataset is established, users can leverage it to generate insights through reports, charts, and dashboards, allowing for data analysis and visualization tailored to specific business needs. It's important to note that while other options mention aspects related to reporting (such as visuals and interface), they do not accurately capture the central role of a dataset in the Power BI ecosystem, which is to store and prepare data for analysis and reporting purposes.