Tawaaf refers to the act of circling around the Kaaba seven times in a counter-clockwise direction. It is an essential ritual performed during both Hajj and Umrah.

This act symbolizes the unity of Muslims in worshiping the One God, as all pilgrims move together around the Kaaba. The Kaaba is the sacred house of Allah located in the Masjid al-Haram in Makkah.

Tawaaf is a demonstration of devotion, obedience, and respect towards Allah. Pilgrims begin the Tawaaf at the Black Stone corner and complete seven full circuits.

Understanding the meaning of Tawaaf helps Muslims appreciate the spiritual significance of this ritual. It is one of the most recognizable parts of the pilgrimage and is repeated in many Islamic traditions.

Therefore, the correct answer is: To circle around Kaaba, which captures the essence of Tawaaf as an important Islamic practice.