A Lightworker is a person who has realized that God, Source, is the most important thing in his or her life, who works consistently to experience and know his or her connection with God, and who works consistently to express that in their daily life in all situations and with all people.
Lightworkers can do their work for God at home, in a regular profession, and in alternative professions.
Some have extreme paranormal abilities and experiences, and experiences of spiritual elevation. Others do not.
Some who have extreme abilities and experiences, are not able to ground that Light in daily life and interactions with other people.
Embodying the Light and Love of God, and other divine qualities like harmony, peace, order, wisdom, etc., is what a Lightworker does.