Adobe Acrobat Reader is a free software application that allows users to view, print, and annotate PDF (Portable Document Format) files. It is widely used for reading documents because it preserves the original formatting, making it easy to share and access files across different devices. With its user-friendly interface, anyone can open a PDF and navigate through its pages effortlessly. In addition to basic viewing, Adobe Acrobat Reader offers features like highlighting text, adding comments, and filling out forms. This makes it a valuable tool for students, professionals, and anyone who needs to work with documents in a digital format.