Here is why you should use or avoid specific ISO configurations;
￮ISO 100-200 is the best setting for an under-exposed photo. On top of protecting the sensor, you can blur any moving subjects in a photo. These settings have drawbacks; they might compromise other components, like slowing the shutter speed. Also, you can get unwanted blurring effects.
￮ISO 250 - 500 (Medium modifications): Unlike the low settings, the medium settings allow you to get faster shutter speeds in addition to the smaller apertures. They also have short backs that affect your image's color composition.
￮ISO settings over 500: Firstly, you can conveniently photograph in low light scenarios using the enhanced shutter speed. It is also perfect if the aspects of noise are needed in your photos. One of the major disadvantages is that you get low-quality photos. Additionally, the amount of noise generated can overwhelm the editing process.