Allah is the name of the One and Only God. Allah has ninety-nine beautiful names, such as: The Gracious, The Merciful, The Beneficent, The Creator, The All-Knowing, The All-Wise, The Lord of the Universe, The First, The Last, and others.
He is the Creator of all human beings. He is the God for the Christians, the Jews, the Muslims, the Buddhists, the Hindus, the atheists, and others. Muslims worship God whose name is Allah. They put their trust in Him and they seek His help and His guidance.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari