The "show all comment types" also has a drop down menu and this consists of the choice of viewing comments and pings.
Any ping you may receive is to be deleted.You do not need these.
next is the filter tab. This will show you the comments you have set up to be flagged in your settings page. This was covered in part one of this tutorial series.
The next tab is the empty spam tab. You may empty your spam folder with one click here, but before you do make sure all the comments there are actually spam.
The next tab is a check for spam tab. This is an advanced way of dealing with spam that we will not get into in this tutorial.