What is prosecutorial discretion your own words what does

Question

1. What is prosecutorial discretion? (your own words, what does it mean to you).
2. Demonstrate how the discretionary decision of a prosecutor - as to whether a suspect should be charged with a crime - makes the prosecutor one of the most powerful actors in the criminal justice system.
3. Discuss the prosecutor's law enforcement role and the need for close cooperation and communication with the police.

References needed