Adobe Illustrator is a powerful vector graphics editor widely used by designers and artists. It allows users to create and manipulate vector graphics, which are images defined by mathematical equations rather than pixels. This means images can be scaled infinitely without losing quality. Illustrator is favored for creating logos, icons, illustrations, and complex graphics that require scalability and precision. Its versatility makes it a staple tool for graphic designers, illustrators, and anyone needing high-quality vector graphics. Overall, Adobe Illustrator is valued for its precision, versatility, and comprehensive set of tools that cater to the needs of professionals working in various design disciplines.