What is the purpose of the extra long slot on some toasters?

Buy Morphy Richards 44234 Food Fusion 2 Slice Long Slot Toaster from Appliances Direct

Smeg's Polished Stainless Steel 4 slice long slot toaster features 2 long, extra-wide slots for toasting breads & bagels 6 browning levels Buy now

long slot toasters 4 slice The FINE ELEMENTS SDA1011 High Quality 4 Slice 1300W Long Slot Toaster White is perfect for making lovely toasted bread at any time of the day It includes

long slot kitchenaid toaster Toasters · Elegant design · 4 slot capacity · As you like it · Easy access · Defrost function · Crumb tray