For instance, it will limit some features of apps running in the background with regard to user input and sensor data. (indianexpress.com)
During our time testing the device, the animations were fluid and the memory consumption was significantly less, even with multiple apps running in the background. (indianexpress.com)
But if you have several apps running in the background, you will experience some slowdown and eventually hit the RAM usage limit. (pcmag.com)