Home Center ( as well as other home chains, like Ace) sell , among other things, wall/ wood paints. Even though the cans of paint are tightly sealed, still there's some paint odor in the air. I don't really know why.
(Big chains and supermarkets usually have spacious, well air- conditioned stores on the outskirts of the town; smaller, crowded branches in the center of the town).
In other cases ( fashion stores ,book stores etc..) it is the owner that wants a "signature" scent in his shop: citrus, musk, cinnamon, wood, you name it...and he'll diffuse the fragrance through air conditioning vents or some other method.
In the majority of cases, the retailers who have discovered what is known as the fifth sense (smell) use it as a marketing tool to lure in customers, just as they use background music and various smart displays of goods. . That's OK, but the problem is that "one man's aroma is another man's stench" and it could drive customers away.
Anyhow, people who think they are sensitive to smells, might, whenever possible, prefer entering bigger, well ventilated places to smaller, scented places.