This option affects how Solid Framework deals with non-table text that it finds in the PDF document.
This text could be titles or descriptions that relate to the table, or it might be something else entirely.
That might be the case if the PDF is a report that contains table data that you are interested in.
As always, the best option depends on what you wish to use the reconstructed Excel file for.
If you are interested in just the data within tables then this option may be more suitable for you.
If you want to keep non-table text then select this option.