Which value of pressure group influence the democracy?

Which value of pressure group influence the democracy?

The following values of pressure group influence the democracy
(i) Public Opinion It helps in the formation of public opinion on various issues.
(ii) Role in Elections Pressure group at the time of election contact both ruling and opposition political parties, so that which ever party comes to power should not ignore their interest.
(iii) Act as a link between Government and the People Pressure groups convey the feeling and complaints of the people to the government. This way they act as a link between government and the people.