Political parties seek to win voter support by outlining policies in a manifesto. They can generally be categorized as left-wing or right-wing on economic and social issues. The document then provides a table comparing the views of the Conservative, Labour, Liberal Democrats, and Green parties on issues like the economy, education, the environment, and immigration. It also summarizes some differences between parties in Northern Ireland like the DUP, Sinn Féin, UUP, SDLP, and Alliance on these same issues.