The word
reality here is improper and misleading if not contextualized, but I could not really think of another word. In Advaita the only existent reality is Brahman who is Sat-Chit-Ananda. This is absolute reality(paramatika satyam) and the reality that is produced from Maya(which we falsely call matter) which produces Jiva and Ishvara, which then produce the rest of the world is the temporal pragmatic reality(vyavahrika satyam) but which is an illusion:
Panchadasi
2.97. If we abstract from the cosmos the existence which underlines it, all the worlds and all objects are reduced to a mere illusory appearance. What does it matter even if they still continue to exist?
6.129. Since the effects of Maya are undeniably manifest, its existence canot be denied. Being stultified by knowledge, it cannot be really said to exist. From the point of view of absolute knowledge it is always inoperative and hence neglible.
6.133. Maya transforms the immutable Kutastha, the every association-less Atman, phenomenally into the form of the universe. Casting the reflections of Atman on itself, Maya creates Jiva and Ishvara
6.136. The magic show looks wonderful and inexplicable so as long as the magician is not directly known, but when the magician is so known, the magic shown is known as such and is no longer wonderful.
6.235. The Sruti decalres that in fact there is no destruction and no origination; none in bondage and none engaged in practice for liberation; no aspirant for liberation and none liberated. This is the transcedental truth.
6.236. Maya is said to the desire fulfilling cow. Jiva and Ishvara are its two calves. Drink of its milk of duality as much as you like, but the truth is non duality.
Hence it is established that ishvara, jiva and world are unreal. This is why a Pure Advaitin does not worship Ishvara, for Ishvara is an illusory product of Maya and the Shruti very explicitly tell us not to worship the unmanifest impersonal energy. An Advaitn does not have to worship anything, an Advaitin listens to the Shruti, contemplates on the Shurti and meditates on the Shruti to realize the paramatika sayam while practicing chittashuddi or purification of their mind so that the meaning of the Shruti awakens their Jnana. In order to achieve this Advaitin practices Yoga to still the activities of the mind to awaken the Jnana within.