(Image is from http://services.flikie.com/view/v3/android/wallpapers/33558844)
Lighting is a very important aspect of photography. Its like water for plants. There are many different types of light. Natural, studio and flash just to name a few. In order to take clear photos lighting is key and then finding the composition, focus and editing process follows.
Now unless you have been living under a rock, you must be familiar with YouTube and blogging sensation Zoella aka Zoe Sugg. Aside from making videos on the internet machine she is also a keen photographer. Her popular blog includes a how to guide on blog photography. I have linked it below. Note that the information is not limited to just blog photography, it can be applied to all types of photography.
https://www.zoella.co.uk/2012/08/how-to-blog-photography.html