Table.Descr Property (Word)
Returns or sets a String that contains a description for the specified table. Read/write.
Use the Descr property to provide an alternative text description for a table. This property adds text to the Description text box on the Alt Text tab of the Table Properties dialog in Word 2010.
Web browsers display alternative text while tables are loading or if they are missing. Web search engines use the alternative text to help find Web pages. Alternative text is also used to assist disabilities.