Aperture is one of the most fundamental and crucial parameters in photography, and having a complete mastery of it will give you greater technical and creative control of your images. This excellent video will introduce you to aperture, what it does, how it works, and how you can use it to make better photos.
Coming to you from Taylor Jackson, this excellent video will introduce you to aperture and how it controls both technical and creative aspects of your photos. Aperture is one of the three fundamental parameters in the exposure triangle, and together with shutter speed and ISO, it determines your overall exposure (you can read about the exposure triangle here). Beyond exposure, however, aperture allows you to control depth of field, which is one of the most powerful tools for isolating your subject and controlling where the viewer's eye focuses in your images. Depth of field is one of the first tools any photographer uses in crafting an image. Check out the video above for the full rundown from Jackson.
And if you want to continue learning about photography, be sure to check out "Photography 101: How to Use Your Digital Camera and Edit Photos in Photoshop With Lee Morris!"