A major consideration for people seeking orthodontic treatment is aesthetics, which is also a top priority. Researchers have developed a range of alternatives, including ceramic or composite braces, lingual orthodontics, and transparent aligners, to satisfy the growing aesthetic need for a traditional brace substitute. A set of transparent dental appliances that are specifically designed to suit a patient's teeth are used in the procedure known as clear aligner therapy. Alternatives to conventional braces that are used to straighten teeth include clear aligners. Similar to braces, clear aligners use a progressive force to control tooth movement, but they do it without the need of metal wires or brackets. The objective of present review literature is to discuss clear aligner therapy in detail.