The purpose of the pretrial exchange of information and data between the People’s counsel and the defense counsel is to .

Read the below (Source - National Institute of Justice)

Explanation:

Pretrial services programs can be valuable resources for making significant improvements in the criminal justice system because they are used in the early stages of the criminal case process. Unnecessary detention before trial not only results in unnecessary jail costs,it also deprives defendants of their liberty. From a policy perspective, decisions about detaining or releasing defendants should balance the benefits of release and the risk of flight or threat to public safety

Edit 1 - Added onto the paragraph