Iʿtikāf is one of the best opportunities for self-perfection and mystical journey. In the mystical school of Ahlul-Bayt (AS), Iʿtikāf, solitary and being away from the worldly affiliations and affairs are the reasons for having a spiritual mood, spiritual journey toward Allah and his proximity.
Iʿtikāf is an Islamic practice consisting of a period of staying in a mosque for a certain number of days, devoting oneself to worship during these days and staying away from worldly affairs.
source : erfan.ir