Ethan wrote:

Hi, I have a Workbook that is displaying one dashed line
column divider and one dashed line row divider on all
worksheets. What do these dashed lines signify and how
can I hide(remove) them?

Most likely, Excel is showing you where page breaks will be when printing.
To be sure, use
View Page break preview
or
File Print preview
and compare with where the dashed lines are.

Hopefully, with this knowledge, the dashed lines won't bother you any more.
They don't show up on the printed copy, I presume.