Harry Potter and the Goblet of Fire has always been a pivotal part of the Harry Potter franchise, with the book and its movie adaptation both being a major turning point in the series. The franchise's fourth installment not only changed the magical story of Harry Potter from a children's tale to a narrative aimed more at young adults, but it was also the host of some very important events that would have major significance in Harry's story moving forward. This included the more formal -- and fatal -- introduction of the Wizarding World's malevolent main antagonist, Voldemort, in his true resurrected form and the thrilling but treacherous Triwizard Tournament that led to the Dark Lord's return.
Source：https://www.cbr.com/harry-potter-triwizard-maze/
