Fair Use is a legal doctrine that allows limited use of copyrighted material without needing permission from the copyright owner. It is often applied in situations like criticism, comment, news reporting, teaching, scholarship, or research. The purpose of Fair Use is to promote freedom of expression while balancing the rights of creators. To determine if a use qualifies as Fair Use, courts consider four factors: the purpose of the use, the nature of the copyrighted work, the amount used, and the effect on the market value of the original work. These factors help assess whether the use is reasonable and justifiable.