This is what will be used to identify your website in search engines, choose wisely.
It is recommended that you keep your description short and to the point. Also using keywords in your description is a plus.
Separate with comma’s (IE: computers, networking, unix)
Optional; the webmaster’s name or alias operating this website.
Optional; the owner or operator of this website.
Optional; tells when or if your certain website expires. Example: April 2014