A member of parliament (usually shortened to MP) is a person in the United Kingdom or in Canada who represents the people of an area (called a "constituency") in the House of Commons. They are voted for by the people in a general election. The Prime Minister chooses when to hold a general election, but must have an election at least once every five years. MPs are usually members of a group called a political party.
In the UK, the main political parties are: Conservative party Labour Party Liberal Democrats Scottish National Party Green Party
In Canada, the main political parties are: Liberal Party Conservative Party New Democratic Party (NDP) Bloc Québécois (BQ) Green Party
Members of provincial legislatures in Canada are sometimes referred to as member of provincial parliament (MPP) and other times member of legislative assembly (MLA).