Pergolas are a great source of shade when you need protection from the sun overhead.
But what about in the morning or late afternoon hours when the sun isn't directly over your head? Sometimes it's slightly to the east or the west, and it's shining right into your outdoor kitchen while you're trying to grill out.
Pergolas are no help at this point, but curtains are. You can attach curtains or blinds to your outdoor kitchen pergola, and turn your outdoor living space into an open air dining and living room that's protected from the sun.
The great thing about blinds is that they can easily be used for privacy or protection from the sun, but they're less permanent than a wall or fence. Blinds can easily be pulled up, and curtains can be tied back.