question #1 Sahih Muslim Introduction 8, Introduction, Narration 7 : What is the significance of the chain of narration in the transmission of hadiths?

Abū Bakr bin Abī Shaybah narrated to us, Alī bin Hafs narrated to us, Shu’bah narrated to us, on authority of Khubayb bin Abd ir-Rahman, on authority of Hafs bin Āsim, on authority of Abī Hurayrah, on authority of the Prophet, peace and blessings of Allah upon him, the same as that.