All the characteristics of this great prayer are by the grace of Allah. He chose it by His decree and singled it out for His bounty and blessings, thus it attained this great importance in this world and in the Hereafter.
The Book of Allah, Mighty and Magnificent, shows that whoever finds what Allah loves hard to bear is blameworthy in the religion and receives Allahs displeasure. Censure and displeasure only come ones way when an obligation is left or a prohibition is committed. Therefore if those who do not have khushu` are censured, its obligation is proven.
The importance of the prayer in Islam cannot be understated. It is the first pillar of Islam that the Prophet ﷺ mentioned after mentioning the testimony of faith, by which one becomes a Muslim.
Taraaweeh prayer is Sunnah mustahabbah (i.e., recommended) according to scholarly consensus, and comes under the heading of qiyaam al-layl (night prayers). The believer should be keen to strive in worship in the last ten nights of Ramadaan more than at other times, because in these ten nights is Laylat al-Qadr.