Video - What makes a logo memorable?
Designer of the Hillary Clinton logo explains in this video
What logos represent, and the main reasons they're memorable: Joe Posner, and Michael Bierut (designer of the Hillary Clinton logo) explain in this interesting video.
Does advertisement alone makes a logo great, or is there something else?
How can a simple mark end up meaning something big? What makes a truly great logo?
For more from Michael Bierut on graphic design, check out his book "How to Use Graphic Design to Sell Things, Explain Things, Make Things Look Better, Make People Laugh, Make People Cry, and (Every Once in a While) Change the World".
Yes, that's the title. And this is the book :)