Pressure groups and movements exert influence on politics in a variety of ways.
(i) They try to gain public support and sympathy for their cause by carrying out information campaigns, organising meetings, filing petitions, etc.
(ii) By organising strikes and disruptions, they seek to make the government take note of their demands.
(iii) They also influence decision-making by lobbying.
(iv) The issues raised by them often influence the policies of political parties.