Hi Arham,
I am Dave, I will help you with this.
Many PC's these days have two graphics options, the integrated graphics on the processor and a separate dedicated graphics card.
Windows will normally manage those devices automatically, the integrated graphics will ne used for simple tasks that do not require much processing and the dedicated graphics card will be used for things like gaming etc.
It is best to let Windows manage that, but if you want to set an application or game to run on one of those, then open the Settings app, then go to System - Display - Graphics and there you can add apps and set which graphics they will use.