a set of principles, goals, and strategies designed to address pressing political issues
A Party Platform summarizes the positions of a political party. For the two main political parties in the US, the Democrats and Republicans, the national party platform is crafted by committees in the national conventions every four years.
An official statement and proclamation of the beliefs, values and policy positions of a political party. Specific statements or positions in a platform are sometimes called "planks," e.g. the "abortion plank" of a party's platform
A party platform, also known as a manifesto, is a list of the principles which a political party supports in order to appeal to the general public for the purpose of having said party's candidates voted into office. This often takes the form of a list of support for, or opposition to, controversial topics. Individual topics are often called planks of the platform.