King Ahasuerus’ advisers recommended a way for him to find a new queen.
Some background and history on Mordecai the Jew and his girl cousin Esther (or Hadassah).
Esther got taken by king’s servants and then she received a year of purification process.
After Ahasuerus and Esther spent some time together he fell in love with her and then made her as his queen.
Since Mordecai was by the king’s gate he found out about a plot against king Ahasuerus and was able to save king’s life which got recorded in king’s historical records.