This tool helps you identify fraudulent use of your domain and provides information that will help configure your email authentication policies (SPF, DKIM, and DMARC) correctly. That helps ensure that legitimate emails reach recipients' inboxes rather than being filtered as spam.
Regular monitoring of your DMARC reports helps you maintain your sender reputation and alerts you to potential fraud, including spoofing, phishing, spam campaigns, malware distribution, and brand impersonation attempts.