Explore the Australian Federal Police website to find information about National Police Checks. Specifically, identify if there are any current advisories or warnings regarding delays in processing applications, and state the general purpose of a National Police Check as described on the site.
Navigate to 'https://www.afp.gov.au/our-services/national-police-checks' Locate and identify any current advisories or warnings related to National Police Checks on the page. Identify the stated purpose or use of a National Police Check according to the website. Synthesize the findings into a concise answer.
Successfully navigate to the National Police Checks page on afp.gov.au. Identify and state the advisory regarding high call volumes and potential delays for the National Police Checks (NPC) helpdesk. State that the purpose of National Police Checks is to provide quick and secure digital certificates.