The explanation of the poem Sulum al-Wusool, where the author clarifies the creed of the Salaf and complements it by explaining the affairs that common people fell into such as presenting forms of worship to graves, rocks, trees and so on.

The book was widely accepted by students of knowledge and scholars alike and excels due to the following reasons:

1. Exceptional presentation and categorization of topics.
2. Collecting a lot of text from the Book and the Sunnah and the statements of the Salaf.
3. Ease of reading.
4. Presenting creed from Ahaadeeth and Athaar.
5. A comprehensive representation of all issues related to creed and the pillars of Eemaan in detail according the methodology of the Salaf.
6. The author conciliates the groundwork of Shaykhul Islaam ibn Taymiyyah which may not be clear elsewhere with the statements of the Salaf in every matter where there is differeing.
7. An abundance of narrations by the Salaf and the Imaams of the Muslims to establish and fortify the correct 'Aqeedah, and to clarify to the beginner that that this creed is pure and not from the innovations of the latter generations, rather it is the creed of the first generation of believers and those who followed them to the day of resurrection.
8. The author’s dependence on authentic Ahaadeeth, and the rarity of inauthentic Ahaadeeth in the book.
9. The collection of the majority of affairs mentioned in the famous books of creed such as al-'Aqeedah at-Tahawiyyah, al-'Aqeedah al Wasitiyyah, al-'Aqeedah at-Tadmuriyyah and the books of Shaykh Muhammad ibn 'Abdul Wahhaab.
10. Speaking about oppositions the Sharee'ah in a simple fashion to facilitate its understanding for the student of knowledge.

ref for reasons why book excels: here