Transparency:
The distrubuted ledgers allow everybody to access the data in a blockchain without classic database roles and permissions
Security:
Security is achieved through consensus of the whole network rather than decisons by a centralized authority
Improved traceability:
All transactions can be retraced. Eg a cup of coffee can be tracked to the bean at the farmer if a supply chain blockchain was used
Increased efficiency and speed:
Blockchain allows for peer-2-peer transactions wich can be done globally and without centralized intermediary
Reduced cost:
Is achieved through the elimination of middlemen/agents/third-parties in general