Many websites force you to click through several pages to read a full-length article, but often if you click on the print link you'll get the entire article on one page.
Reddit user 404_terror submitted this tip to that site's life-hacking section. It's one of those little tips that you can usually come up with on your own but sometimes need a reminder to use it effectively.
Why do sites do this? Usually for page views and additional advertising opportunities.
lifehacks subreddit [Reddit]