Margaret Thatcher advocated for several key political ideologies during her time in office, primarily neoliberalism and conservatism. She promoted free-market policies, reducing the role of the government in the economy and emphasizing individual responsibility. Thatcher's administration focused on privatization of state-owned industries, tax cuts, and reducing public spending. Her strong stance against socialism and advocacy for personal freedom redefined British politics and set the stage for a wider conservative movement in the Western world.