When creating a table, what are those squares in each cell?

[Heidi]

When you create a table in word, what are those little squares that are in
each of the cells and stay there while you are typing at the end of the word.
They do not print, but what are they for?

 

[Greg Maxey]

Heidi,

It is the end of cell marker. See:

http://word.mvps.org/faqs/formatting/NonPrintChars.htm