There are three different stages in working on Power BI, as explained below.
The primary step in any business intelligence is to establish a successful connection with the data source and integrate it to extract data for processing.
The next step in business intelligence is data processing. Most of the time, the raw data also includes unexpected erroneous data, or sometimes a few data cells might be empty. The BI tool needs to interpret the missing values and inaccurate data for processing in the data processing stage.
The final stage in business intelligence is analyzing the data got from the source and presenting the insights using visually appealing graphs and interactive dashboards.