The internet you can access through your browser is only 5% of the entire internet. Beyond that is the deep web; pages that can't be accessed by search engines. It contains libraries of private or forgotten data. Beyond the deep web is the "dark web," where the worst of human nature resides.
Marketplaces exist on the dark web for cybercriminals to buy and sell online credentials, credit cards, and personal health information. EDTS Cyber can monitor the dark web for the resale of your company usernames, email addresses, and other data that could potentially be used to access your systems without your knowledge.