The Exposure triangle is a vital part of photography a can have a massive impact on the style of photography that you can access and the quality and levels of the photos that you can take if the triangle is understood and used probably.

Aperture -Aperture controls the iris diaphragm within the lenses which let is sensitive to light and is what lest in the difference amount of light into the camera.

ISO -This controls how sensitive to light the camera is, for daytime you would use a low ISO and for night time photography a high ISO would be needed.

Shutter speed – Controls the amount of time that the sensor is exposed to light for, which can be turned up or down.