It is per Allah (or God and same God in Christianity and Judaism) command. Kabah is the first God house on earth and was raised up by prophet Ibrahim (or Abraham) together with his son prophet Ismael.
While Muslims are in Makkah (Mecca) they face the Kaaba; the oldest God house on earth.
They face the direction of Kaaba during praying while in Makkah (or Mecca(
To take the direction of Kaaba in Makkah (or Mecca) in Saudi Arabia.
Because the Prophet p.b.u.h. prayed that way and Allah s.w.t. said so.
The Kaaba.
Muslims orient themselves toward the Kaaba in Mecca when praying because it is considered the holiest site in Islam. The act of facing the Kaaba during prayer symbolizes unity and solidarity among the Muslim community, as all Muslims around the world face the same direction when they pray. It also serves as a physical focal point to help Muslims concentrate and feel a connection with the Prophet Ibrahim (Abraham) and the origins of Islam.
because that is where The Holy Kaaba is and The Holy Kaaba is known among the muslims as the House of God.
Muslims pray toward the Kaaba in the city of Mecca, located in Saudi Arabia. This act of facing the Kaaba during prayer is called "Qibla." It symbolizes the unity and uniformity of worship among Muslims worldwide.
Muslims face towards the Kaaba in Mecca, Saudi Arabia, the most sacred site in Islam, when they pray as a way to unify the Muslim community and demonstrate their submission to God. This direction is known as the qibla. Muslims around the world face the Kaaba in Mecca during their five daily prayers as a symbol of unity in worship.
Muslims pray towards the city of Mecca. Specifically towards the Kaaba. Mecca
Muslims pray facing the Qibla i.e. Kaaba in Makkah in Saudi Arabia.
They face Kaaba in Makkah (or Mecca) in Saudi Arabia