ISO-ISO is a number that represents how sensitive your camera sensor is to light. The higher the ISO number, the higher your camera’s sensitivity, and the less light you need to take a picture. The trade-off is that higher ISOs can lead to degraded image quality and cause your photos to be grainy or ‘noisy.

This is how I put the flagged filter.

Shutter speed is the speed at which the shutter of the camera closes. A fast shutter speed creates a shorter exposure and controls the amount of light the camera takes in and a slow shutter speed gives the photographer a longer exposure.

The aperture controls the amount of light that enters through iris in the lens and is measured in f/stop ,you can adjust this by changing said f/stops.

Depth of field is defined as what is in focus in front and behind the subject, shallow depth in field has limited things in focus often with a blurred background this requires f/stop or f/2 or f/4 depth of field is defined by aperture the higher the number the more in focus an example of this would be f/16 or f/22

As seen here the aperture is f/2.8 meaning the depth