Following in the latter's footsteps he traveled through Provence and Spain to strengthen religiosity among the Jews and teaching them the way to serve God.
Rabbi Moses' arrangement and presentation are heavily influenced by Maimonides' discussion of the commandments in the Sefer Hamitzvot and by his codification of the Halakha in the Mishneh Torah.
However, unlike Maimonides, Rabbi Moses presents lengthy discussions of the different interpretations and legal opinions.
He also makes extensive use of other codes, and particularly of the commentaries of Rashi and the Tosafot, usually favouring these Ashkenazi traditions over Maimonides.
He was also the author of Old Tosafot (תוספות ישנים) to Yoma and of some published in the collection "Sugyot HaShas" (Berlin, 1736).