Pressure groups are organisations that attempt to influence government policies. These are formed when people with common occupation, interest, aspirations come together to achieve some common objectives. But they do not aim to share political power.
Generally, there are three types of pressure groups
(i) Sectional Interest Groups They represent a section of society like, workers, employees, business persons, industrialists, followers of a particular religion, etc. Their main concern is the betterment and well-being of their own members, not society in general.
(ii) Promotional or Public Interest Groups They
promote collective rather than selective good. They aim to help groups other than their own members.
For example, a group fighting against bonded labour fights not for itself but for all who are the victims of this social curse.
(iii) Movement Groups Most of the movement groups are issue-specific that seek to achieve a single objective within a limited period. For example, Narmada Bachao Andolan which started with the specific issue of the people displaced by the creation of Sardar Sarovar Dam on the Narmada river.
Pressure groups exert pressure or influence on the politics of a country in various ways which play a significant role in policy making decisions of the country.