I've been doing photography for a year and I've become curious about soft light and its use in Wedding photography. What are some methods to create soft light?
You can use a reflector, an external flash, a softbox on a flash...These are the main less heavy solutions, that can be used.
There are a lot of videos and tutorials you can read and watch for any particular way!
Hope that helps!
You soften light by diffusing it. Anything that increases the surface area that light is coming from will work. It can be a softbox, an umbrella, a reflector or even bouncing the flash off a ceiling.
The softness or hardness of a light comes from how directional the light is and the size of the area the light is coming from largely determines how directional the light is.
Beyond that basic primer, using soft light is a complex and deep part of the field that can't be summarized in one question and answer.
Probably the best source of soft light is natural light through a window, doorway, etc. As AJ points out, it's about finding a large source of light. It's usually suggested that you use a north-facing window if you're in the northern hemisphere, since you'll get diffuse light as opposed to direct sunlight through the window.