Ensure Integrity of Content
Every file on IPFS has a unique address determined by the exact bits that comprise the file. If even a single bit changes, the whole address changes. This allows the users to know for sure if a file has ever been tampered with.
Host with Redundancy
Achieve resiliency because every file on IPFS can be hosted in many different places, yet accessed from the same address. If one computer hosting the file goes offline, the network will just retrieve the file from another computer.