So, what is this OpenGL that we speak of? Well, OpenGL is a collection of graphics APIs; essentially, this is a collection of code that allows you to gain access to the features of your graphics hardware. The current version of OpenGL is 4.6, but any graphics hardware that is capable of running OpenGL 4.5 can run 4.6 as well.
OpenGL is entirely hardware and operating system independent, so it doesn't matter if you have a NVIDIA or AMD GPU; it will work the same on both hardware. The way in which OpenGL's features work is defined by a specification that is used by graphics hardware manufacturers while they're developing the drivers for their hardware. This is why we sometimes have to update the graphics hardware drivers if something doesn't look right or if the game is not performing well.
Furthermore, OpenGL runs the same, regardless of whether...