Mystery Shopping is not a new concept. It has been in use since several years. Mystery shopping companies can actually help improve the overall service and image of retail end companies and brands. Fast moving consumer good manufacturers rely heavily on their customer service to help increase sales in stores. However, if the customer service department is lacking in any way, it will affect the company's image and success rate.Mystery shopping companies are highly useful in this aspect. Read on to know how they can help improve overall customer service.Impartial feedbackWhen a professional mystery shopping company is hired, they send employees to act as real shoppers at a retail store. The secret shoppers are taught to assess several things like the attitude of the sales staff, their willingness to help, the level of politeness and so on. Once this data is collected, it is shared with the client.On the other hand, when you don't hire a mystery shopping company, you need to rely on the feedback provided by the manager of the store regarding the employees. Sometimes, managers may offer feedback that is not entirely true just to protect the people he likes most. On the contrary, a mystery shopping company will offer true feedback regarding the state of the sales staff, thereby helping to improve the overall customer service.Overall assessmentAn in-house manager gets paid to run the store and manage the staff within it. While being a leader and helping the employees grow or improve their quality of service is also part of his job, he may not always focus the relevant amount of time doing it. A mystery shopping company helps provide an overall assessment on the state of the customer service and sales department. This helps the main employer to know where the real drawbacks lie and how he can fix them.