There are ENDLESS videos and help tutorials freely available on the web, even for specific programs.
Data visualization “...helps the human eye perceive huge amounts of data in an understandable way. It enables researchers to represent, draft, and display data visually in a way that allows humans to more efficiently identify, visualize, and remember it. " (Orkodashvili, 2014)
Building an information visualization can aid you in your research process in many ways, but predominately:
Orkodashvili, Mariam, PhD, Salem Press Encyclopedia, January, 2014.
Here is a Cheat Sheet for helping you choose a graphic that best suits your goal: Mike Parkinson's Graphic Cheat Sheet.
David McCandless turns complex data sets (like worldwide military spending, media buzz, Facebook status updates) into beautiful, simple diagrams that tease out unseen patterns and connections. Good design, he suggests, is the best way to navigate information glut — and it may just change the way we see the world.