Final answer:
Campaigns often engage in canvassing to increase voter registration and turnout through direct interaction with potential voters and GOTV efforts. Gerrymandering is not a tactic to increase registration but to influence electoral outcomes.
Step-by-step explanation:
Campaigns often engage in canvassing to increase voter registration and turnout. This is a strategy where campaign workers or volunteers go door-to-door in targeted neighborhoods, make phone calls, and utilize social media to persuade people to register and vote. Activities like distributing literature, arranging for transportation to the polls, and offering assistance with registration are all part of the Get Out The Vote (GOTV) efforts.
Policies such as allowing online voter registration and sending voter registration ballots to residents are also measures taken to improve registration rates. In contrast, strategies like gerrymandering, although associated with political parties, are tactics used to redraw district boundaries to influence the outcome of elections and are not directly related to increasing voter registration or turnout.