Background apps are applications or processes that remain active when they are not the main visible screen. They can perform useful work such as updates or synchronisation while also using network, memory or processing resources. Their effect on playback depends on the platform's resource management and actual workload rather than their mere presence in a list.
A practical example
A device installing updates in the background can temporarily feel slower while its player remains open. Comparing playback after the supported updates finish helps examine the resource contention without assuming the subscription or programme source changed during the test.
A common misunderstanding
Do not disable system components indiscriminately to reduce a background-app count. Use supported controls, distinguish ordinary services from unneeded activity and retain functions required for security or device operation.
Related terms
Stable technical definition. Editorial approach