It is some sort of information which can be used to detect, alert, identify a cyber threat! That information can be network , host , behaviour based .
The main goal of cyber threat intelligence is to give companies a deeper understanding of what is happening outside their network and give them a better view of cyber threats that pose a greater risk to their infrastructure. You need threat intelligence for effective security.
The cyber intelligence also deals with tracking analyzing digital threats such ad viruses, hackers that aim to steal sensitive information over the Internet.
Passive cyber intelligence
Active cyber intelligence.
Security device auditing.
Physical security analysis