Tehillim is recited by Jewish people collectively and individually, as the desire occurs to offer praise and thanksgiving to G-d; or alternatively, in times of crisis and need, as a form of supplication, and even as a venue to express regret for sin.
The Tzemach Tzedek said, "If one would only know the power of verses in Tehillim, and their effect on high, one would recite them continuously.
The verses of Tehillim transcend all barriers and ascend higher and higher, imploring the Master of the Universe until they achieve results of kindness and mercy."
