This ayat is made up of 9 sentences. It tells us that everything is maintained and exists because of Allah. The first sentence contains two names of Allah, similarly in the last sentence there are also two names of Allah!
In the second sentence Allah tell us that us humans become tired and sleepy, but in the 8th sentence Allah tells us that guarding the skies and the earth does not exhaust Allah subhanAllah!
Abu Huraira narrated that the Messenger of Allah (Allah bless him and give him peace) said, “Everything has its splendor, and the splendor of the Qur’an is Surah al-Baqara. In it is a verse which is the greatest verse of the Qur’an: Ayat al-Kursi.” [Tirmidhi]
Abu Hurayra said, “The Messenger of God (Allah bless him and give him peace) put me in charge of guarding the alms (zakat) of Ramadan. Someone came to me and began to take handfuls of food. I grabbed him and said, ‘By Allah, I will take you to the Messenger of God!’ – and he mentioned the narration – “He said, ‘When you go to bed, recite the Throne verse (ayat al-kursi), and you will have someone guarding over you from Allah and Satan will not come near you until morning.’ The Prophet, may Allah bless him and grant him peace, said, ‘He told you the truth even though he is a liar. That was Satan.’” [Bukhari]