You can use a PivotTable to summarize, analyze, explore, and present summary data. PivotCharts complement PivotTables by adding visualizations to the summary data in a PivotTable, and allow you to easily see comparisons, patterns, and trends. Both PivotTables and PivotCharts enable you to make informed decisions about critical data in your enterprise. You can also connect to external data sources such as SQL Server tables, SQL Server Analysis Services cubes, Azure Marketplace, Office Data Connection (.odc) files, XML files, Access databases, and text files to create PivotTables, or use existing PivotTables to create new tables.
Source: https://support.microsoft.com/en-us/office/overview-of-pivottables-and-pivotcharts-527c8fa3-02c0-445a-a2db-7794676bce96
Power Query (Get & Transform) and Power Pivot complement each other. Power Query is the recommended experience for importing data. Power Pivot is great for modeling the data you’ve imported. Use both to shape your data in Excel so you can explore and visualize it in PivotTables, PivotCharts, and Power BI.
In short, with Power Query you get your data into Excel, either in worksheets or the Excel Data Model. With Power Pivot, you add richness to that Data Model.
Source: How Power Query and Power Pivot work together