Speech protected refers to the types of expression that are safeguarded under the First Amendment of the U.S. Constitution, which guarantees freedoms concerning religion, expression, assembly, and the right to petition. This protection is crucial in fostering open dialogue and debate in society, allowing individuals to express their opinions without fear of government censorship or punishment. However, this protection is not absolute, as certain categories of speech, such as obscenity or incitement to violence, may not be protected under the law.