Fake news destroys your credibility. If your research uses made up or false information, you may fail a course or have your research rejected. If your arguments are built on bad information, people may not believe you in future conversations.
Fake news can hurt you, and a lot of other people. Purveyors of fake and misleading medical advice can perpetuate myths (like vaccines cause autism). These websites or blogs spread dangerous lies
Real news can benefit you. If you want to buy stock in a company, you want to read accurate articles about that company so you can invest wisely. If you are planning on voting in an election, you want to read valid and factual information on a candidate so you can vote for the person who best represents your ideas and beliefs.
You deserve the truth. You are smart enough to make up your own mind - as long as you have the real facts in front of you. You can learn to critically evaluate online resources to find the facts.