What does Max 100GbE density in a Switch mean ?

Hi,

We are looking for a 48 Port switch and wanted some information.

dell_emc_networking-s5200_on_spec_sheet.pdf (delltechnologies.com)

In the PDF link above, page 3 shows the Features as below.

What is not clear is :

1) What does Max 100 GbE Density mean

2) How is Max Density related to number of ports

Thank You