On average, only 20% of those who read your headline will click through to read your article. That means good headlines lose 80% of your audience. Great headlines, though, can make a dramatic impact in the opposite direction. You can increase the traffic to your articles by as much as 500%, based solely on the headline.
Want to find out how blog or post headline formulas can help your content be more successful? Ryan Scott has written an excellent article called 13 Types of Blog Headlines That Will Get You More Traffic on Hubspot Blog.