Final answer:
A Flat Table is a static sortable table with rows of data, suitable for simple, linear presentations of information. It is chosen based on the desired insights from the data, and while it can neatly present information, other table types like Explorer, Map Overlay, or Pivot Tables might be used for dynamic or complex data analysis.
Step-by-step explanation:
The type of custom report that shows a static sortable table with rows of data is a Flat Table. This kind of table presents data in a linear, two-dimensional manner, which allows for easy location and comparison of specific data points.
Considering the other options, the Explorer report in analytics tools often includes dynamic elements like graphs alongside data tables; a Map Overlay provides geographical data representation; and a Pivot Table allows for more complex data manipulation and multi-dimensional analysis.
In terms of data grouping, you might choose different ways to group your data based on the specific insights you are seeking. For instance, using a pivot table can uncover trends and patterns that a simple flat table might not reveal. No one table is inherently more correct than another; it depends on the context and purpose of the analysis.