The discussion section allows you to choose whether or not the page is open to discussion by visitors to your website. You have two options:
1. Allow Comments, and
2. Allow Pings
Allowing comments will allow visitors to leave a comment on your page. Allowing pings will allow visitors to link to your page from their own page and will appear in your comments section as a link.
Comments and Pings may or may not be enabled on your site, so setting these options here may have no effect on the way your site looks and behaves.
NB: You should consult your web developer or IT department about whether or not to your site is enabled for Comments and/or Pings.