Threat intelligence
Information about who is attacking, what tools they use, and what to look for, applied to your own defenses.
Useful intelligence is specific and actionable: this group targets businesses like yours, they gain access this way, and here are the indicators to watch for. A generic feed of malicious IP addresses is mostly noise.
The value comes from application rather than collection. Intelligence that changes a detection rule, a firewall policy, or a patching priority is worth having; intelligence that produces a monthly report nobody acts on is not.
Where this comes up
Threat intelligence sits inside our cybersecurity and threats work. If you are trying to work out what this means for your own environment rather than in the abstract, that is the page worth reading next, and a short call will get you a straight answer faster than either.