To explain the topic more thoroughly, Domain pointing actually takes domain parking to another level by allowing multiple domains which resolve or go to different index pages or directories on the same hosting account.
Where domain pointing would come into play is if you wanted to maintain 2 distinctly different web sites while paying and maintaining only one hosting account. It is almost like a 2x1 deal.
For example:
www.abc.com -> http://abc.com/index.html
www.def.com -> http://abc.com/def/index.html
With domain pointing, the additional domain name(s) point to a subdirectory on the account. However this is invisible to visitors (www.abc.com/def is recognized and treated as the root directory of www.abc.com in the same way as www.abc.com/def is recognized and handled as def.abc.com if you were to make it a subdomain).