During a criminal investigation, prioritizing the evidence is paramount to your success as an investigator. Filtering what is critical to the case and what isn't is the difference between success and failure of an investigation.
Forensic triage - sometimes referred to as "digital forensic triage" - is the process by which you collect, assemble, analyze, and prioritize digital evidence from a crime or investigation.
It's difficult to do this in a timely manner when you don't have the proper tools. Depending on the type of investigation, it's a process that can involve sorting through mountains of digital data.