About Baal Shem Tov
Israel ben Eliezer, known as the Baal Shem Tov or BeShT (בעש״ט), was a Jewish mystic and healer regarded as the founder of Hasidic Judaism. A baal shem tov is a "Master of the Good Name"—that is, one able to work miracles using a secret name of God. Other sources explain his sobriquet as arising from a reputation of being a saintly, or superior, Baal Shem ('miracle-worker'); hence, he was given the nickname Baal Shem Tov.
Biography source:
Wikipedia
