Ground improvement process are necessary at the locations where soil is unstable or weak to carry the structural loads. This can be due to the nature of soil, groundwater location or other geological reasons. This article explains state of the art techniques used for the improvement of weak soil strata and various methods of improving the ground to construct heavy structures like bridges and buildings. Further it explains each techniques in a detailed way with examples, advantages, application and disadvantages. This can be very useful for construction contractors, designers, structural and geotechnical engineers. Great read for engineers.