Granola is usually a baked mixture rather than a plain grain cereal. That makes the ingredient list, serving weight and preparation method especially important.
Why granola clusters
Oils, syrups, nut or seed butters and baking help ingredients bind and crisp. Two products that look similar can use very different binders and amounts.
Dense servings need weight-based comparison
Granola packs tightly and is easy to overpour when judged by bowl volume. Compare products using the same weight basis and use a kitchen scale temporarily if you want to learn what the listed serving looks like.
Nuts, seeds and fruit
These additions change flavour and texture, but they also create allergen considerations and affect package price. Dried fruit may be sweetened or unsweetened; verify the ingredient list.
Plain base versus complete bowl
A concentrated granola can be used as a topping on yogurt, fruit or a plainer cereal rather than as the entire bowl. That is a serving choice, not a rule.