1) WHITE HAT TECHNIQUE
It is a long run process where every day we keep on adding the new links to it. on a very fine day you don’t get your site on top. it takes some time to get it on top rank
2 ) BLACK HAT TECHNIQUE
It is a unethical technique where the result comes in a very short time. the Google will penalize those sites and if it ranking 2nd then the next day it might go to the 10th position
3) GREY HAT TECHNIQUE
It is the combination of both white hat and black hat technique
4 )BLUE HAT TECHNIQUE
It is same as that of the grey hat technique. it also combine the white and black techniques.and some people use this for the instant result.