The Presentation Layer is the sixth layer of the OSI Model, which is a framework used to understand network communication. Its primary function is to translate, format, and encrypt data for the application layer above it. This ensures that the data sent from one system can be understood by another, regardless of differences in data formats or encoding. In addition to data translation, the Presentation Layer also handles data compression and encryption. This means it can reduce the size of data for efficient transmission and secure sensitive information before it is sent over the network. Overall, it plays a crucial role in ensuring smooth communication between applications.