Is it bad for them if they eat really quickly?

I have seen bowls for sale that cause dogs to eat their food more slowly. I am just wondering why is this? Is it harmful if they gobble down their kibble really quickly?

Gisgo loves his BH and eats the whole lot down in a very short space of time. I am mostly relieved that he does not seem to be a fussy eater at all.....but beginning to wonder if I need to take steps to slow him down at all?



thanks for any information.