Powerpoint uses photos and words to tell a story. PowerPoint makes sharing ideas easier by making it look and feel easier, that's the only way to describe using PowerPoint.the two links you can use for help is:
http://office.microsoft.com/en-us/powerpoint-help/create-your-first-presentation-RZ001129842.aspx
https://www.biochem.wisc.edu/medialab/tutorials/powerpoint_how_to.pdf
http://office.microsoft.com/en-us/powerpoint-help/create-your-first-presentation-RZ001129842.aspx
https://www.biochem.wisc.edu/medialab/tutorials/powerpoint_how_to.pdf