A political party platform or platform is a formal set of principal goals which are supported by a political party or individual candidate , in order to appeal to the general public, for the ultimate purpose of garnering the general public's support and votes about complicated topics or issues. "Plank" is the term often given to the components of the political platform – the opinions and viewpoints about individual topics, as held by a party, person, or organization. The word "plank" depicts a component of an overall political platform, as a metaphorical reference to a basic stage made out of boards or planks of wood . The metaphor can return to its literal origin when public speaking or debates are actually held upon a physical platform.
A party platform is sometimes referred to as a manifesto  or a political platform. Across the Western world, political parties are highly likely to fulfill their election promises.  In the United States, platform positions offer important clues as to the policies that U.S. parties will enact. Over the past 30 years, Democratic and Republican congresspeople voted in line with their respective party platforms 74% and 89% of the time, respectively.
The first known use of the word platform was in 1535. The word platform comes from Middle French plate-forme , literally meaning "flat form".  The political meaning of the word to reflect "statement of party politics" is from 1803, probably originally an image of a literal platform on which politicians gather, stand, and make their appeals. 
A 2017 study in the American Journal of Political Science found that for 12 countries (Austria, Bulgaria, Canada, Germany, Ireland, Italy, the Netherlands, Portugal, Spain, Sweden, the United Kingdom, and the United States) found that political parties in government fulfill their promises to voters to a considerable extent.  The study determined that:
Parties that hold executive office after elections generally fulfill substantial percentages, sometimes very high percentages, of their election pledges, whereas parties that do not hold executive office generally find that lower percentages of their pledges are fulfilled. The fulfillment of pledges by governing executive parties varies across governments in ways that reflect power-sharing arrangements. The main power-sharing arrangement that impacts pledge fulfillment distinguishes between single-party governments and coalitions, not between governments with and without legislative majorities. We found the highest percentages of pledge fulfillment for governing parties in the United Kingdom, Sweden, Portugal, Spain, and Canada, most of which governed in single-party executives. We found lower percentages for governing parties in Germany, the Netherlands, Austria, Bulgaria, Ireland, and Italy, most of which governed in coalitions . Pledge fulfillment by U.S. presidential parties lies at the higher end of coalition governments, which suggests that U.S. presidents are more constrained than governing parties in single-party parliamentary systems, but less constrained than most governing parties in multiparty coalitions.
Other research on the United States suggests that Democratic and Republican congresspeople voted in line with their respective party platforms 74% and 89% of the time, respectively.
Famous political platforms
- The Ninety-Five Theses of Martin Luther in 1517, opposed practices of the Catholic Church at that time (both a religion and a political territory), and led to the establishment of Protestantism
- Thomas Paine 's pamphlet Common Sense (1776) advocated freedom from the rule of Great Britain for the American Colonists and proposed a constitution for the new United States
- Friedrich Engels and Karl Marx 's 1848 Communist Manifesto , called for the abolition of private property and applied a scientific understanding to the development of society through socialism into a society without money-usage, social classes, or state coercion, which would be called " communism "
- Franklin Roosevelt's 1932 New Deal
- The 1948 United States Democratic Party 's platform including civil rights
- Lyndon Baines Johnson 's War on Poverty , 1965
- The 1993 Liberal Party of Canada Red Book
- The 1994 Republican congressional Contract with America
- Mike Harris 's 1995 Common Sense Revolution
- 100-Hour Plan of the United States Democratic Party in 2006