Question

what is the significance of electoral roll in elections​

Answer 1

The electoral roll (also called an electoral register, voters roll or poll book) is a list of persons who are eligible to vote in a particular electoral district and who are registered to vote, if required in a particular jurisdiction. An electoral roll has a number of functions, especially to streamline voting on election day. Voter registration is also used to combat electoral fraud by enabling authorities to verify an applicant's identity and entitlement to a vote, and to ensure a person doesn't vote multiple times. In jurisdictions where voting is compulsory, the electoral roll is used to indicate who has failed to vote