Yeah had the same reaction. It takes some background to get what they are taking about.
Red Team: A team that try to exploit an organisation to find weakness before black hackers find them. [1] Blue Team: A team that tries to protect the org from the red team and fix the exploits. [2] SIEM: Security Information and Event Management. Usually used by Blue teams. [3]
[1] https://en.wikipedia.org/wiki/Red_team [2] https://en.wikipedia.org/wiki/Blue_team_(computer_security) [3] https://en.wikipedia.org/wiki/Security_information_and_event...
PS: search skills are really important these days.