Answer:
Whether the customers hold a very positive or weak attitude toward the product.
Step-by-step explanation:
When a customer buys a product by inertia, they are doing it because they are used to doing so, and really pay no attention to the fact that they purchasing that specific product. E.g. when you purchase some convenience products, like toilet paper, milk, spices, etc., you purchase the same brands over and over again not because you are a fan of Charmin and dislike Scott (or vice versa), but because you always buy it.
When someone purchases a good or service because they are loyal to the brand, it means that the product itself is something that is relatively important to them, at least important enough for them to pay attention. Someone who is loyal to a brand will only purchase that specific brand, and if it is not available, will generally not purchase anything. E.g. I like Coke and despise Pepsi, so if there is no Coke, I drink water.