What the Beautiful Names are
The Quran says that the most beautiful names belong to Allah, and that believers should call on Him by them (Quran 7:180). Another verse tells us to call Him Allah or Ar-Rahman, because all the best names are His (Quran 17:110).
Surah al-Hashr ends with a group of names, including Al-Malik (the King), As-Salam (the Source of Peace), Al-Khaliq (the Creator) and Al-Aziz (the Almighty) (Quran 59:22-24). These verses are a good place to start reading about the names.
These verses show that the names are not only words to recite. They are a way to know Allah and to call upon Him with love and hope.