Knowing the URL link if it is a phishing site or not is just one of the first steps in identifying if it is one but surely it isn't enough. Some phishing links really do have a carbon copy of the real website and they also get a convincing domain name (if you aren't familiar with their real domain of the website) to come with it so really being an observant people and looking at security patches and logos is your only way of telling if its a phishing website or not.