Dematerialisation of shares is the process of converting physical share certificates into electronic form, making them easier to store, transfer, and trade. The process involves opening a Demat account with a Depository Participant (DP), submitting a Dematerialisation Request Form (DRF) along with physical certificates, and having them verified by the registrar. Advantages include reduced paperwork, faster transactions, enhanced security, and elimination of risks like theft or damage. Disadvantages include dependency on technology, account maintenance charges, and possible technical glitches. Overall, dematerialisation streamlines shareholding while ensuring transparency and efficiency in securities trading.