The document discusses different types of visualizations that can be used to summarize spreadsheet data, including pivot tables, static visualizations like charts, and dynamic visualizations. Pivot tables automatically sort, count, and total spreadsheet data to show only the most relevant information. Static visualizations provide clear views of spreadsheet information either from pivot tables or other sources. Dynamic visualizations provide animated displays of data to help visualize trends over time. The document provides an example of a Google motion chart comparing work and study hours for two students over two weeks.