What is the significance of Reverend Hale's questioning the Proctors.

Hale visits the Proctor home as a direct result of Elizabeth's name being brought up in court. He was summoned to Salem to investigate accusations of witchcraft, thus, it is his job to investigate those who've been accused. His visit is significant because his findings will help determine whether or not the accusation is justified. His initial intent is to assess Elizabeth and John's commitment to the Church, their virtue, Puritan beliefs, and way their beliefs are demonstrated within their home.