This quite detailed 'overview' by Rabbi Yaacov Francus assumes an understanding of the meaning of Hallel, which is not given here. The intention of this article is to explain why the Hallel on the night of Pesach is different to all other Hallels.

Hallel refers to six psalms (113 - 118) said as a unit on joyous occasions. These psalms are said to embody the fundamental themes of the Judaic faith.