Without QoS, network data can become disorganized, clogging networks to the point where performance degrades or, in certain cases, the network shuts down completely.

Quality of service is important because enterprises need to provide stable services for employees and customers to use. Quality of service determines Quality of Experience (QoE). If the services an organization provides are not reliable, customer and employee relationships may be put at risk.

Additionally, data integrity and security are more likely to be compromised in a company with a poor QoS. In general, employees and customers depend on communication services to do their jobs. When quality of service suffers, quality of work and Quality of Experience suffer as well.