the purpose for man’s creation is to worship the Creator.

I created jinn and mankind only to worship Me, I want no provision from them, nor do I want them to feed Me, God is the Provider, the Lord of Power, the Ever Mighty.
[Quran 51:56-58]

Allah ﷻ further states that He made this life in order to test mankind so that every person may be recompensed after death for what he/she has earned

[He] who created death and life to test you [people] and reveal which of you does best––He is the Mighty, the Forgiving;
[Quran 67:2]

Seek the life to come by means of what God has granted you, but do not neglect your rightful share in this world. Do good to others as God has done good to you. Do not seek to spread corruption in the land, for God does not love those who do this,
[Quran 28:77]

We shall certainly test you with fear and hunger, and loss of property, lives, and crops. But [Prophet], give good news to those who are steadfast, those who say, when afflicted with a calamity, ‘We belong to God and to Him we shall return.’ These will be given blessings and mercy from their Lord, and it is they who are rightly guided.
[Quran 2:155-157]

The word “Islam” is an Arabic word which literally means “submission to God”, and Muslims are those who willfully submit to and actively obey God, living in accordance with His message.

Islam, a name given by Allah to this religion.

Today I have perfected your religion for you, completed My blessing upon you, and chosen as your religion Islam: [total devotion to God]
[Quran 5:3]

People, We created you all from a single man and a single woman, and made you into races and tribes so that you should recognize one another. In God’s eyes, the most honored of you are the ones most mindful of Him: God is all knowing, all aware.
[Quran 49:13]