Allah - WHO IS ALLAH?

Say, "He is Allah,
(who is) One, Allah, the Eternal Refuge.
He neither
begets nor is He born,
Nor is there to Him any equivalent."
(Quran, Purity (of faith) 112:1-4)

Allah is arabic name for God and is used by Arabic speakers. In Islam is the most important concept is the fact that Allah is One and nothing shares His attributes. He has no partners, no parents or offspring and is the ultimate Creator of the universe. He is the One who was the beggining and will continue after the end as we know it. The same Creator that has been worshipped throughout time as the Originator of the universe.
Allah has created all things with a design and purpose. Included in this is the creation of the Heavens and the Earth and all of mankind, starting with the very first humans, namely, Prophet Adam and his wife Eve (known in Arabic as Hawa). Throughout time, people started to deviate from the worship of Allah and started to create idols and worship these as partners or intercessors with Allah.

To Begin in the 'NAME OF ALLAH'

The entire religion of Islam is based on the idea of getting closer to Allah. So there is an emphasis in Islamic tradition to begin everything with Allah's name by using the Arabic phrase, 'Bismillah' which means 'In the name of Allah'. Muslims, when referring to the name of Allah, often add the words 'Subhana-hu-wa-Ta-ala' after it, meaning 'Glorified and Exalted is He' as a sign of reverence.
Allah is considered genderless, however there is no appropriate word to express this in the English language, so Allah is commonly referred to as a 'He'. Muslims also tend to use many other phrases in their daily lives that contain the word Allah, for example:

Allahu Akbar - Allah is the Greatest.
Bismillah - In the name of Allah.
Insha'Allah - If Allah wills.
Ya Allah - Oh Allah.
Ma sha'Allah - Look at what Allah has willed!
Subhan Allah - Glory be to Allah.
Al-Hamdu li-llah - All praise be to Allah.
Jazak Allahu khayran - May Allah reward you well with goodness.