Immunisation is one of the most effective, affordable, and highly beneficial healthcare initiatives for preventing, controlling, and eradicating diseases, particularly in children, sparing millions of lives yearly. Despite tremendous efforts over the years by the government and other health organisations, complete immunisation coverage has not yet been reached, and many infants and children are still deprived of its benefits. This is mostly because of insufficient community involvement in routine immunisations and inadequate IEC campaigns and advertising. The extent of knowledge, attitudes, and practices (KAP) among the caregivers of children towards Immunisation plays an important role in boosting vaccination rates, preventing vaccine-preventable diseases in children and minimising potential errors regarding vaccination and their adherence to the guidelines established by the Ministry of Health and Family Welfare, India. This review paper aims to provide a valuable, informative, and critical summary of the important aspects of knowledge, attitudes, and practices regarding vaccination among caregivers of children under five.