Are you talking about content finder search ?
If yes you can do serach
You can also customize
No, he talks about ordering the assets currently being displayed in the browser list on the left side in WCM edit mode.
If you have for examle let's say 360 images named like this:
And if they are not ordered by name you will really have fun collecting 360 images one after another by searching or scrolling though the list.
Imagine parsys and drag'n'drop them all in the rigth order.
Here an image showing that assets are not ordered by name.