You have clicked on a link that you failed to identify as non-legit. Although this particular website is safe, you could possibly have ended up as a victim of a phishing attack due to your ignorance, if the link you clicked on was actually malicious!
You would have just clicked on a phishing link!
Berkeley University answers the most important questions about phishing.
security.berkeley.edu Dealing with suspicious emails, phone calls and text messagesHow to spot the most obvious signs of a scam, and what to do if you've already responded.
ncsc.gov.uk German examples for phishing attemptsThe German Consumer Protection Agency has a list of recent phishing attempts that you should definitly check out.
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