The key components of a Power BI dashboards include visualizations, such as charts, graphs, and maps, that represent data in a meaningful way. These visuals are connected to datasets, which provide the underlying data for analysis. Filters and slicers allow users to interact with the dashboard, refining the displayed information based on specific criteria. Tiles are individual sections of the dashboard that can display visuals, KPIs, or even web content. Additionally, the layout and design of the dashboard play a critical role in how easily users can navigate and interpret the data presented.