Ayatul Kursi is known as the greatest verse of the Quran which is recited daily by millions of people around the world. There are many benefits of reciting Ayatul Kursi which are narrated from Prophet Muhammad (PBUH).
Aayatul Kursi is the 255 verse of Surah Baqarah, in which Allah is praised and His protection is sought from all harms, indeed it is Allah who has created us and it is HE who can protect us.
The verse and its translation defines why it is recited for protection:
Allah: There is no god but He, the Living, the All-Sustaining. Neither dozing overtakes Him nor sleep. To Him belongs all that is in the heavens and all that is on the earth. Who can intercede with Him without His permission? He knows what is before them and what is behind them; while they encompass nothing of His knowledge, except what He wills. His Kursiyy (Chair) extends to the Heavens and to the Earth, and it does not weary Him to look after them. He is the All-High, the Supreme. (255) There is no compulsion in Faith. The correct way has become distinct from the erroneous. Now, whoever rejects the Taghut (the Rebel, the Satan) and believes in Allah has a firm grasp on the strongest ring that never breaks. Allah is All-Hearing, All-Knowing.
The urdu translation of this ayat is as follows:
In a hadith narrated by Abu Hurairah in Bukhari it is recommended to read the verse before going to sleep. According to that narration if a Muslim reads this verse from Surah Baqarah he will be protected from any type of harm.
This is why Muslims from around the world read Ayatul Kursi for protection from any type of harm, evil or accident. The know the importance of ayatul kursi so they recommend each other recite it.
There is another benefit of reciting this verse which is narrated by our beloved Prophet (PBUH). “Whoever recites Aayat al-Kursiy immediately after each prescribed prayer, there will be nothing standing between him and his entering Paradise except death.” (narrated by Ibn Hibbaan in his Saheeh)
Many people think that it is required to read the verse for certain amount of times such as 100 times but there is no such hadith. Many people frame this verse and put it on walls, many scholars allowed this as it reminds us to read the verse. So memorize this verse and recite it for protection.