Lobbyist: A lobbyist is a person hired by an interest group to advocate for their interests by persuading lawmakers to support policies aligned with the group's goals.
PAC (Political Action Committee): A PAC is a type of organization formed by an interest group that can raise money from its members and donate it to political campaigns or candidates who support the group's agenda.
Grassroots Campaign: This term refers to organizing efforts undertaken by members or supporters of an interest group at the local level, aiming to mobilize public opinion and put pressure on policymakers.