The paper gives an overview regarding biomarkers their rudimentary characteristics and the abridgment between biomarkers and cancer treatment. The different type of biomarkers and their utility in different environments and conditions gives us cutting edge in terms of cancer treatment. Biomarkers have indeed brought a revolution in the field of medical diagnosis. They have proven to be harbingers of change in the clinical industry. They have a dual functionality and may be used alone or in combination to monitor the health or disease state of an individual. Various clinical assessment techniques have been carried out using biomarkers. The paper gives brief review about biomarkers and also studies various developments that have been done in the recent years.