Help understanding and using terrain shaders

[MotoX745]

ok ive got off on this in the wrong way apparently i got specular fixed now so it dont look like plastic but im having issues getting the detail i want like the shaders that DJ99x has made etc. and yFMX im not understanding how they can get there normals to look like a bump map and to operate as a bump and normal map if you get what im saying from both of these guys there normals also look like a bump map and everytime i try it my textures turn out really shitty and i want my textures to be good so im asking you guys if you know to help me please cuz i want this detail.

[137]

It would be nice for a written or a video tutorial on how to do terrain shaders.

[MotoX745]

yea cuz id like my tracks to be good but my normals dont come out how id like em and my specular is always way to bright