This module allows to attach tabular data to an entity.
The input form allows the user to specify the number of rows and columns and allows input into each table cell using text fields.
Tables can be defined globally and per entity, so each node can have multiple tables of arbitrary size.
Enter data by hand or by CSV upload. Users can also download table data as CSV files if desired. Tables can have multiple values and with revision capability.
The truth is that it is a contributed module that is rarely used, but for specific projects where simple tabular data has to be displayed ... it is a very useful Drupal module.