We are all responsible for Technology Security in one way or another, but the most effective attacks come through email and trick users into clicking a link, providing their User Name and Password or opening an infected attachment.
This is generally called Phishing, and is a serious threat to our internal security.
You can learn how to spot these malicious emails by becoming aware of the tactics that hackers use to trick users.
The Federal Trade Commission has an excellent article on this topic, which you can read here: https://www.consumer.ftc.gov/articles/how-recognize-and-avoid-phishing-scams#recognize
The best defense is an educated user, because security always comes down to people.