Freedom of expression is defined as an indivisible human right that forms the basis of other rights and measures the effectiveness of laws. It aims to enable all people to speak freely without fear of consequences. Several international agreements protect this right, including the Universal Declaration of Human Rights. However, issues like government censorship, cultural differences, technology limitations, and hate speech endanger this right. Repressive regimes in places like Cuba, Eritrea, Burma, Iran, North Korea, and China severely limit freedom of expression through imprisonment and online censorship of journalists and bloggers. Ensuring this right is important for public awareness, development, and holding governments accountable.