Answer by taking a quote from the following article:

Arabs (; Arabic: `arab ISO 233 'arab, Arabic pronunciation ['?arab] ( listen)) are a population inhabiting the Arab world. They primarily live in the Arab states in Western Asia, North Africa, the Horn of Africa and western Indian Ocean islands.

The earliest documented use of the word "Arab" to refer to a people appears in the Kurkh Monoliths, an Akkadian language record of the ninth century BCE Assyrian conquest of Aram, which referred to Bedouins of the Arabian Peninsula under King Gindibu, who fought as part of a coalition opposed to Assyria. Listed among the booty captured by the army of king Shalmaneser III of Assyria in the Battle of Qarqar are 1000 camels of "Gi-in-di-bu'u the ar-ba-a-a" or "[the man] Gindibu belonging to the Arab (ar-ba-a-a being an adjectival nisba of the noun 'arab). The related word `a'rab is still used to refer to Bedouins today, in contrast to 'arab which refers to Arabs in general.  The oldest surviving indication of an Arab national identity is an inscription made in an archaic form of Arabic in 328 using the Nabataean alphabet, which refers to Imru' al-Qays ibn 'Amr as "King of all the Arabs". Herodotus refers to the Arabs in the Sinai, southern Palestine, and the frankincense region (Southern Arabia). Other ancient Greek historians like Agatharchides, Diodorus Siculus and Strabo mention Arabs living in Mesopotamia (along the Euphrates), in Egypt (the Sinai and the Red Sea), southern Jordan (the Nabataeans), the Syrian steppe and in eastern Arabia (the people of Gerrha). Inscriptions dating to the 6th century BCE in Yemen include the term "Arab".  The most popular Arab account holds that the word "Arab" came from an eponymous father called Ya'rub who was supposedly the first to speak Arabic. Abu Muhammad al-Hasan al-Hamdani had another view; he states that Arabs were called Gharab ("West") by Mesopotamians because Bedouins originally resided to the west of Mesopotamia; the term was then corrupted into "Arab".  Yet another view is held by al-Masudi that the word "Arabs" was initially applied to the Ishmaelites of the "Arabah" valley. In Biblical etymology, "Arab" (in Hebrew Arvi ) comes both from the desert origin of the Bedouins it originally described (Arava means wilderness).  The root '-r-b has several additional meanings in Semitic languages--including "west/sunset," "desert," "mingle," "mixed," "merchant," and "raven"--and are "comprehensible" with all of these having varying degrees of relevance to the emergence of the name. It is also possible that some forms were metathetical from '-B-R "moving around" (Arabic '-B-R "traverse"), and hence, it is alleged, "nomadic."

What is the meaning of the Word Arab ?
people