"Read After Write" is a consistency model in computer science that ensures when a system writes data, any subsequent read operation will return the most recent value. This is crucial in applications where accurate and up-to-date information is necessary, such as in databases or distributed systems. In this model, if a user writes a value to a variable or database, they can immediately read that value afterward and expect to see the same data. This guarantees that the system behaves predictably, which is essential for maintaining data integrity in environments like cloud computing and multi-threaded applications.