Is this whole bean or ground?

The listing describes a 12 oz light roast but does not state the form. Check the bag label before buying if your brewer needs a specific grind.

How does light roast differ from medium or dark?

Light roasting stops earlier, so more of the bean's origin flavor, acidity and aroma survive. You get less body and roast sweetness than a darker roast.

Is it good for espresso?

Light roasts can work as espresso but are harder to dial in and often taste sharp or thin. They shine most in pour-over and drip.

Light roasts carry more acidity, which some drinkers read as bright and others as sour. A slightly finer grind and cooler water can tame it.

How should I store it?

Keep the beans in an airtight container away from light and heat, and grind just before brewing. Whole beans hold their flavor longer than ground coffee.