Perhaps you’re a young family with 2 or 3 children and a dog and let’s say that you have a few guests from time to time come by or stay with you. You may want to consider a carpet that will hold up under medium to moderate traffic.
Another consideration is how often you plan to have the carpet cleaned and how often you plan to vacuum your carpet. These two actions will also make a difference on how well the carpet may wear. If you plan to have the carpet professionally cleaned perhaps twice a year and plan on vacuuming two or three a week the carpet will wear much longer. If this type of scenario fits you, consider choosing a carpet that wears well over time with medium traffic use. If you vacuum less and have the carpets cleaned less often you will want to choose a carpet that is suited for more moderate to heavy traffic.