Supermarkets are investing in micro-fulfillment centers with the hope that automation can help reduce the costs of online commerce and ecommerce by shortening the distances from store to home and speeding up deliveries. In short, MFCs are said by many to be the key to profitably fulfilling online orders. Types
U.S. categorization
The U.S. FMI food industry association, drawing on research by Willard Bishop, defines the following formats (store types) that sell groceries:

Organic and environmentally-friendly supermarkets
Some supermarkets are focusing on selling more (or even exclusively) organically certified produce. Others are trying to differentiate themselves by selling fewer (or no) products containing palm oil. This as the demand of palm oil is a main driver for the destruction of rainforests. As a response to the growing concern on the heavy use of petroleum-based plastics for food packaging, so-called "zero waste" and "plastic-free" supermarkets and groceries are on the rise. Growth in developing countries
Beginning in the 1990s, the food sector in developing countries has rapidly transformed, particularly in Latin America, South-East Asia, India, China and South Africa. With growth, has come considerable competition and some amount of consolidation. The growth has been driven by increasing affluence and the rise of a middle class; the entry of women into the workforce; with a consequent incentive to seek out easy-to-prepare foods; the growth in the use of refrigerators, making it possible to shop weekly instead of daily; and the growth in car ownership, facilitating journeys to distant stores and purchases of large quantities of goods.
The basic appeal is the availability of a broad selection of goods under a single roof, at relatively low prices. Other advantages include ease of parking and frequently the convenience of shopping hours that extend into the evening or even 24 hours of the day. Supermarkets usually allocate large budgets to advertising, typically through newspapers. They also present elaborate in-shop displays of products. Supermarkets typically are chain stores, supplied by the distribution centers of their parent companies, thus increasing opportunities for economies of scale. Supermarkets usually offer products at relatively low prices by using their buying power to buy goods from manufacturers at lower prices than smaller stores can. They also minimise financing costs by paying for goods at least 30 days after receipt and some extract credit terms of 90 days or more from vendors. Certain products (typically staple foods such as bread, milk and sugar) are very occasionally sold as loss leaders so as to attract shoppers to their store. Supermarkets make up for their low margins by a high volume of sales, and with of higher-margin items bought by the attracted shoppers. Self-service with shopping carts (trolleys) or baskets reduces labor costs, and many supermarket chains are attempting further reduction by shifting to self-service check-out. History
In the early days of retailing, generally an assistant fetched products from shelves behind the merchants counter while customers waited in front of the counter, indicating the items they wanted.