Transfering the physical shares to an electronic format is know as dematerialisation of shares. When you trade in the share market, all your shared are stored in your online demat account.
The primary use of this demat account is to store your stocks into electronic format for a quick and hassle free transaction.
To understand the demat account, read the Knowledge Bank by Kotak Securities by clicking the below link-
https://www.kotaksecurities.com/ksweb/Research/Investment-Knowledge-Bank/what-is-demat-account
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