Transparency: The nature of the ledger being publicly accessible means anyone can view what blocks have been added.
Security: The mathematical protocols involved in creating blocks that are chained to the previous one allow for immutability. Once a transaction is added it cannot be removed or changed.
Improved traceability: Blockchain allows for real time auditing. This can provide great value to supply chain businesses.
Increased efficiency and speed: The decentralized nature reduces or eliminates the need for middle men. Smart contracts can automate much of the work middle men would be responsible for.
Reduced cost: The reduction in need for middle men reduces the people needed to pay for executing those tasks.