Software architecture is like a blueprint that tells the computer what instructions to follow when it makes a program. It's a way of organizing the pieces of a program so that it runs smoothly, like a map. For example, a software architecture might tell the program how to access a database, how to get input from a user, and how to display information on the screen. By laying out the different steps of the program in the architecture, it makes it easier for people to create or change the software or to find and fix problems.