The ISO setting will brighten and darken a photo. If you increase your ISO number, your photos will get brighter. ISO is good to help you capture images in dark environments.
The Shutter Speed and Aperture I used for these photographs were 1/300 and F4.
These image were taken under artificial lights inside meaning that ISO 400 is the best ISO for this location. I haven’t edited the photos to help show the differences between the different ISO numbers naturally without any exaggeration.