This is just the adobe acrobat reader (Reads the PDF Files) with also the adobe air installer included.
Adobe® Reader® is the tool for opening and using Adobe PDFs that are created in Adobe Acrobat®. Although you can't create PDFs in Reader, you can use Reader to view, print, and manage PDFs. After opening a PDF in Reader, you have a variety of tools to help you find information quickly. If you receive a PDF form, you can complete it online and submit it electronically. If you receive an invitation to review a PDF, use the commenting and markup tools to annotate it. Use the Reader multimedia tools to play video and music in a PDF. And if a PDF contains sensitive information, you can sign or certify a document with a digital ID.