Can someone explain what Minecraft shaders are and how to install them?
Shaders are graphical (in mc stop shadows, the water and light) improvements. So it is changed how it is calculated and displayed on the screen. To install simply use the best video on youtube
Shaders improve the display of shadows, light and reflection. Google times afterwards and look at the pictures, then you can see it.
But with shaders you should not make the field of view so big because it always lays with shaders
I recommend you download Optifine
Then you can zoom, install shaders and much more. Instructions are available on YT.
Minecraft shaders are "light modifications" that make your game look better with better textures.