What is a slicer in Power BI?

A slicer in Power BI is a visual filter that enables users to interactively select data segments. This interactive element helps users refine their reports and dashboards by selecting specific subsets of data, which updates the visuals on the page accordingly. By allowing users to filter data dynamically, slicers enhance the exploration of data, making it easier to focus on relevant information.

For example, if a report contains sales data, a slicer could allow users to filter that data by region, product category, or time period. This interaction not only improves user engagement but also provides deeper insights into the dataset, as users can quickly see the effects of their selections on various visuals in real-time.

The other options refer to different functionalities within Power BI: creating reports is a broader activity that encompasses much more than just filtering; data connections are about linking to different data sources; and exporting data refers to the process of extracting data from Power BI for use elsewhere. Slicers specifically emphasize interactive filtering, making option B the most accurate description of what a slicer is in Power BI.