Grocery store shopping does not have to be difficult. Believe it or not, the grocery store is set up in a way to get you to purchase what they want you to place in your cart. Whether you want to or not. Some of these items can be healthy but, unfortunately, most are not.
Grocery stores are paid to support a specific product line and to advertise. For instance, if Keebler is promoting a new cookie, they will market and pay the grocery store for space at the front of the store or on an end-cap (space at the end of the isle). This is where the food is most noticeable to the consumer. As for product placement on the aisles, it is about the grocery store making the most money. So anything within eyesight and where no reaching or bending is involved is where the most popular and most profitable items are located.