What kind of religion is Islam?

Islam is a universalizing, monotheistic, Abrahamic faith.

Islam is a religion of monotheism. According to Islam religion principles, Muslims believe in one and one one God (Allah in Arabic), the Creator, with no associate, no partner, no son, no companion, and no resemblance. Refer to question below for more information.

It's a monotheistic religion.

Muslims believe in one God who has no partners, no children, no parent,...

This is the Muslim understanding of God:

112:1-4

Say: He is Allah, the One and Only;

Allah, the Eternal, Absolute;

He begetteth not, nor is He begotten;

And there is none like unto Him.

2:256

Allah - there is no god except Him, the Ever-Living, the Sustainer of all existence. Neither sleepiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who is it that can intercede with Him except by His permission? He knows what is before them and what is behind them, and they encompass not a thing of His knowledge except for what He wills. His Kursi (throne) extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great.

Beliefs:

Muslims believe in One God and the Muhammad is his last messenger.

Muslims believe in God, his angels, his books, his messengers, the Day of Judgment, destiny.

These are some laws of Islam:

6:151 Say, "Come, I will recite what your Lord has prohibited to you. [He commands] that you not associate anything with Him, and to parents, good treatment, and do not kill your children out of poverty; We will provide for you and them. And do not approach immoralities - what is apparent of them and what is concealed. And do not kill the soul which Allah has forbidden [to be killed] except by [legal] right. This has He instructed you that you may use reason."