The campaign practice of getting out and speaking to a targeted group of people is called answer canvassing voter suppression efforts smear campaigns push polls

The campaign practice of getting out and speaking to a targeted group of people is called canvassing. Canvassing is a common political campaign strategy where campaigns directly reach out to and contact people to convince them to vote for a certain candidate. This is done by giving a canvasser a list of people to contact by calling voters or knocking on their doors. 

The answer is to spread the world of christ