The important building blocks of Power BI are as follows:
Visualizations
Visualization is the process of generating charts and graphs for the representation of insights on business data.
Datasets
A dataset is the collection of data used to create a visualization, such as a column of sales figures. Dataset can get combined and filtered from a variety of sources via built-in data plugins.
Reports
The final stage is the report stage. Here, there is a group of visualizations on one or more pages. For example, charts and maps are combined to make a final report.
Dashboards
A Power BI dashboard helps you to share a single visualization with colleagues and clients to view your final dashboard.
Tiles
A tile is an individual visualization on your final dashboard or one of your charts in your final report.