Lobbyists operate within the political system by influencing legislation and policy decisions. They represent interest groups, such as corporations, unions, or advocacy organizations, and engage with lawmakers to advance specific agendas. This involves direct lobbying, where lobbyists meet with officials, and grassroots advocacy, which mobilizes public support. By providing information and strategic insights, lobbyists aim to shape public policy in favor of their clients, often facing scrutiny regarding their impact on democracy and potential for corruption.