One of the things that sets Costco apart from other superstores is the relatively limited amount of products sold there. While an average Walmart has over 140,000 products, Costco only carries about 4,000, according to CNBC.
This selectiveness allows Costco to offer manufacturers exclusive access to their more than 80 million worldwide members. For example, Duracell is the only battery brand Costco offers both in-store and online.
Less choice also leads to easier decision-making for the customer, which can lead to increased sales, marketing consultant Pam Danziger told CNBC.