This video speaks about removing sensitive information in Adobe Acrobat 9. The viewer might get a very obvious idea of removing sensitive information by redaction. Redaction is the process of permanently removing sensitive information from a PDF file. This is done by opening the Advanced menu, clicking "Redaction" and then clicking "Show redaction tools", which can be in any format, images or text. The viewers will definitely get a clear idea of removing such sensitive information by redaction, especially businessmen and educationalists.