Business process interoperability means different businesses and systems can work together and understand each other. It's like having a conversation. For example, imagine you want to talk to someone who speaks Spanish and you only know English. If the two of you could find someone that speaks both English and Spanish, the Spanish speaker could tell your English words to the person who speaks both and they could tell the Spanish speaker what you said in Spanish. Business process interoperability works in similar way. It connects organizations and businesses so that they can understand each other and communicate with each other. This helps make it easier to do business, save time and money, and create better cooperation between businesses.