The document discusses pivot tables in Excel. It defines a pivot table as a tool for summarizing a list into a simple format. It explains that you can create pivot tables from lists by defining which fields should be columns and rows and what data to summarize. You do not need to use all the data, just what is needed to answer questions. Once created, the pivot table allows you to see the answer. The document then provides steps for creating a pivot table, including selecting the source data, target location, rows and columns, filters and aggregates. It notes various layout, slicer, and other options that can be used.