"Ms." is a title used before a woman's last name or full name, regardless of her marital status. It is a neutral term that allows women to be addressed without revealing whether they are married or single. This title is often preferred in professional settings, as it promotes equality and respect. The use of "Ms." became more popular during the women's rights movement in the 20th century, as women sought to have their identities recognized independently of their relationships with men. Today, many women choose "Ms." to assert their individuality and professionalism, making it an important part of modern communication.