Preamble serves the following purposes:
(a) It refers to the source of constitution.
(b) It embodies the enacting clause which brings into force the constitution.
(c) It declares the fundamental rights and freedom which the people of India intended to secure. It also indicates the basic type of polity and government, which was to be established.
(d) The Preamble is an epitome of broad elements of Indian Constitution.
(e) The scope of the significant chapter of directive principles and the fundamental right could be understood in the light of the objectives enshrined in the Preamble (Bharti Chandra vs. State of Mysore)
(f) Preamble is considered as part of the Indian Constitution, but it is neither a source of any power nor a limitation there on. This view was first asserted in the Re Berubari Case and again extroverted by J. Mathew in Indira Gandhi vs. Raj Narain.
(g) The preamble of our constitution is very much enacted and adopted by the enacting body in the same manner as the other enacting provision. Thus the Preamble of the constitution occupies the same provisions as other enacting words or provisions of the constitution.