Of the 44 psalms in this section, 15 are ascribed to David, one (Psalm 127) to Solomon, and the rest are anonymous.
The Hallel. Psalms 113-118 constitute the Hallel, which is recited verbatim on the three festivals of Pesach, Shavu'ot, and Sukkot. The Hallel is also recited at Rosh Chodesh (the new moon) and during the eight days of Chanukah. Psalm 136 is generally called "the great Hallel." The Hallel is usually recited after the shacharit (morning) service after the Amidah.
Psalms 120-134 are referred to as "Songs of Degrees," and are thought to have been used as hymns of approach by pilgrims to the Temple in Jerusalem.
Acrostic Psalms. Psalm 119 is the longest Psalm, with each set of 8 pesukim (verses) beginning with one of the 22 Hebrew letters. Other psalms that have alphabetical arrangements are Psalm 9, 10, 25, 34, 37, 111, 112, and 145.