What is demat account?

Demat account is for keeping stock in electronic form.
so we need De-mat account to do trade in stock market but we have to know what is De-mat account, how to open this account ,where to open and other uses for all the information please click the below link and read out details about de-mat account.

http://www.indiastudychannel.com/resources/112016-What-DEMAT-account.aspx