Private interest groups are those with personal stakes on an issue. Public interest groups are those groups that advance the concerns of the public at large.
Lobbyists are paid while interest groups aren't
To eat banana pudding.
Pressure groups
Interest groups can sometimes are called pressure groups. Interest groups will also be called organizations or associations for special interests.
Pressure Groups - Gradpoint
electing its members to office
movt. group has broad aims whereas pressure group has narrow aims. movt group has loose organisational structure but pressure groups has comparatively strict organisational structure.
civil society is an organization formed in the society to push societal interest to the government without any political affiliation whiles pressure groups are groups formed by group of people with similar interest and mind to push their interest to the government for the benefit of their members only and sometimes have political affiliations
Sectional pressure groups represent the common interests of a particular section of society whilst causal pressure groups are more focused on a specific set of usually political or economic ideals
They seek to put pressure on the government to affect political policies
Both interest groups and pressure groups are like the arterial network giving feedback to policies of government. they infact are a basis of 'popular participation' in a democracy.