What does the mobile phone camera s mean?

Mobile phone camera S stands for "shutter priority" or "shutter priority", and the value inside represents shutter speed. The higher the value, the shorter the shutter time.

Shutter priority is to get the aperture value through camera metering when the shutter is defined manually. Shutter priority is mostly used to shoot moving objects, especially sports shooting. When shooting a moving object, the subject is blurred, mostly because the shutter speed is not fast enough. In this case, you can use the shutter priority mode, roughly determine a shutter value, and then shoot. And the motion of the object is generally regular, then the shutter value can also be roughly estimated. For example, the shutter speed only takes1125 seconds to shoot pedestrians, while it takes11000 seconds to shoot falling water droplets. The automatic metering system will calculate the exposure value, and then automatically determine how much aperture to use according to the selected shutter speed.