What was the main message Muhammad was given?

The main message given to Muhammad, as conveyed in the Quran, is the oneness of God (Allah) and the importance of monotheism. He emphasized the need for moral integrity, social justice, and compassion towards others, urging people to worship God alone and adhere to His guidance. Additionally, Muhammad called for the establishment of a just society and the importance of accountability in the afterlife. His teachings formed the foundation of Islam, promoting a comprehensive way of life based on faith and ethical conduct.