In the same way that Empire Strikes Back took the original trilogy in a completely different direction after picking up from A New Hope, Rian Johnson's The Last Jedi has radically altered the trajectory set by J.J. Abrams' The Force Awakens.
Not only are they vastly different from a narrative standpoint, with the new director having his own say over where to take the wealth of plot threads established in the previous movie, but everything from the tone of the comedy to the look of the lightsabers has been completely shaken up going into the latest sequel.
Fortunately, the shift in direction has resulted in a film far greater than The Force Awakens. While they're both still amazing movies in their own right, the decisions The Last Jedi makes will have far-reaching effects on the entire Star Wars universe to come, and act as a confident step forward for a franchise perceived to have been playing things far too safe under Disney's tutelage.
Of course, there's spoilers galore going forward, so if you don't want the mystery of how Jar Jar returns to destroy the First Order ruined, then check the film out before diving headfirst into the reasons why it's easily the best entry in the new trilogy so far.