Pressure groups and movements exert influence on politics in a variety of ways
(i) They try to gain public support and sympathy for their goals and their activities by carrying out information campaigns, organising meetings, filing petitions, etc.
(ii) By organising strikes or disrupting government programmes, they seek to make the government take note of their demands.
(iii) They also influence decision-making by lobbying.
(iv) In some cases, pressure groups are either formed or led by the leaders of political parties.