Song of Ascents is a title given to fifteen of the Psalms, 120–134 (119–133 in the Septuagint and the Vulgate), each starting with the ascription Shir Hama'aloth (Hebrew: שִׁיר המַעֲלוֹת, meaning "Song of the Ascents"). They are also variously called Gradual Psalms, Songs of Degrees, Songs of Steps or Pilgrim Songs.
Four of them (122, 124, 131 and 133) are linked in their ascriptions to David, and one (127) to Solomon.
Many scholars believe the title indicates that these psalms were sung by worshippers as they ascended the road to Jerusalem to attend the three pilgrim festivals (Deuteronomy 16:16). Others think they were sung by the Levite singers as they ascended the fifteen steps to minister at the Temple in Jerusalem. One view says the Levites first sang the Songs at the dedication of Solomon's temple during the night of the fifteenth of Tishri 959 BCE. Another study suggests that they were composed for a celebration after Nehemiah's rebuilding of Jerusalem's walls in 445 BC. Others consider that they may originally have been individual poems which were later collected together and given the title linking them to pilgrimage after the Babylonian captivity.
They were well suited for being sung by their poetic form and the sentiments they express. "They are characterized by brevity, by a key-word, by epanaphora [i.e., repetition], and by their epigrammatic style.... More than half of them are cheerful, and all of them hopeful." As a collection, they contain a number of repeated formulaic phrases, as well as an emphasis on Zion.