Another component of the photography triangle is aperture. Aperture regulates the amount of light permitted through the lens to the sensor. The larger the opening the more light passes through, and the smaller the opening the less light passes through. To complicate matters, the f-stop which refers to the size of the aperture is a large number for a small opening and the smaller the number the larger the opening. By changing the aperture you can change the exposure of the image, but also change the depth of field.
Depth of field is the manipulation of the focal plane, its the aesthetic of having the subject in front of a blurry background, or getting every plane of a landscape in sharp focus. You need to be mindful of how much or how little depth of field to ensure that it is appropriate for you. Restricting depth of field may not always be possible on very bright days and ensure that the subject for a larger aperture is in very sharp focus.
Larger aperture = small f number = more light = shallower depth of field
Small aperture = large f number = less light = broader depth of field
Happy Snapping, CJeffers x