Marriage equality refers to the legal recognition of marriage between individuals regardless of their gender or sexual orientation. This means that same-sex couples have the same legal rights and responsibilities as opposite-sex couples when it comes to marriage. The movement for marriage equality has gained significant traction in many countries, leading to changes in laws and public attitudes. Advocates argue that marriage is a fundamental human right, and that denying same-sex couples the ability to marry is a form of discrimination. Key milestones in this movement include landmark court cases and legislative changes in various regions around the world.