Lobbying is the act of attempting to influence the actions, policies, or decisions of officials, most often legislators or members of regulatory agencies. Lobbying, which usually involves direct, face-to-face contact, is done by many types of people, associations, and organized groups, including individuals in the private sector, corporations, fellow legislators or government officials, or advocacy groups (special interest groups).
Direct lobbying refers to attempts to influence a legislative body through communication with a member or employee of a legislative body, or with a government official who participates in formulating legislation. Grassroots lobbying refers to attempts to indirectly influence legislation by asking the general public to contact legislators and government officials.
In either case, the communications must refer to and reflect a view on the legislation.