Stoke basically adds a black outline to the text that makes it pop more, Drop Shadow is what it says, adds a shadow of your text to the backdrop. Both of these are features of Adobe Photoshop, but I will assume that other photo editing apps have them as well. Personally I also like to use 3D extrusion, inner glow, outer glow, and bevel & emboss in addition to stroke and drop shadow...but not texture, I just don't care for it.What is stroke and drop shadow