Do they really matter? The UK's political parties are preparing to release their plans for what they would do if they won power.
Get involved: Write your own manifesto
Promises: Previous manifestos from the major UK parties — but none of the pledges are legally binding. Glossary
Manifesto - A statement published by a person or group of people, especially a political party, or a government, in which they say what their aims and policies are.
General election - In the UK, when an election is held for all 650 members of the House of Commons. One must take place every five years.
Government - The group of people who govern - or lead - the country.
Conservative party - A British political party. Members are known as Tories.
Referendum - A direct vote by the population of a country on a particular law or issue.
European Union - A political and economic union of 27 countries.
Brexit - The UK's departure from the European Union.
Liberal Democrats - Also known as the Lib Dems, a liberal political party in the UK.
MPs - Members of Parliament. MPs are elected to represent people in 650 different geographical areas.
Boris Johnson - The Conservative Prime Minister of the UK and head of the government from 2019 to 2022.