Many groups find that their interests are better advanced if they organize
and act collectively. They undertake political action or education in the
hope of furthering their causes. For most of these groups, political activity
is just one facet of their work.
Some private individuals and companies act as professional lobbyists for other groups or companies. Lobbyists try to exert influence on government decision makers to ensure favourable laws and contract awards. Industry Canada provindes information about lobbyist registration, which tries to ensure lobbyists working with the federal level of government behave according to certain standards.
Hillwatch provides useful lists of hundreds of interest groups and associations as well as think tanks in Canada who try to influence poublic policy.