Enterprise architect is a special kind of person who helps big companies and organizations to plan how they should design and build their computer systems. Just like how you might draw a plan for building a treehouse, enterprise architects draw a plan for building computer systems.
They make sure that all the different parts of the computer system work well together and that everything is organized in the best possible way. They talk to all the people who are going to use the computer system, like employees and customers, to understand what their needs are and make sure that the system works well for everyone.
Think of enterprise architects as the master builders of computer systems, making sure everything is in the right place and working together smoothly. Without them, companies might end up with messy and confusing computer systems that don't work the way they are supposed to.