List and explain the four service levels offered by retailers

What will be an ideal response?

Retailers meet widely different consumer preferences for service levels and specific services. The four levels of service usually offered by retailers are:
1. Self-service: Self-service is the cornerstone of all discount operations. Many customers are willing to carry out their own "locate-compare-select" process to save money.
2. Self-selection: Customers find their own goods, although they can ask for assistance.
3. Limited service: These retailers carry more shopping goods and services such as credit and merchandise-return privileges. Customers need more information and assistance.
4. Full-service: Salespeople are ready to assist in every phase of the "locate-compare-select" process. Customers who like to be waited on prefer this type of store. The high staffing cost, along with the higher proportion of specialty goods and slower-moving items and the many services, result in high-cost retailing.