What is the function of the cis-Golgi network?

Proteins are synthesized in the endoplasmic reticulum and are transported to the Golgi complex for further processing and modification. 

The cis-Golgi network is the entry point for proteins into the Golgi complex and is responsible for sorting and directing the proteins to their appropriate destination within the Golgi complex. Once the proteins have been properly sorted, they are transported through the Golgi cisternae towards the trans-Golgi network, where they are further modified and packaged into vesicles for transport to their final destination within the cell.

Therefore, the function of the cis-Golgi network is to receive proteins from the endoplasmic reticulum.