Some cleaning

I have a problem with uderstanding the following:
'''
Another advantage is the ability of using the collection dynamically without pain.
Let's say that we want to put all BlogPost into a user collection (so one collection
by user) :

    >>> user_col = 'me'
    >>> blogpost = con.mongokit[user_col].BlogPost()
'''
I can't really get the point of this paragraph.
I'd highly appreciate if anyone could explain that.