Well, that was quite the episode.
The Spoils of War serves as a direct response to anyone complaining about a lack of action in Season 7 thus far, delivering a blistering, breathtaking, dragon-centric set-piece.
The showdown of Dany, Drogon, and the Dothraki vs Jaime and Bronn et al stole the show, but the entire episode was pretty great, and made some major plot advancements. Arya returned home, received a Valyrian steel dagger, and fought Brienne; Cersei took the gold despite being enduring a loss; and Jon started getting his dragonglass.
With so much carnage and chaos (of the ladder kind and otherwise), there were a lot of details packed into the episode that were easy to miss. Jaime's fall into the water echoed both Tyrion and Bran, the Mets' Noah Syndergaard made a cameo, the Catspaw Dagger returned, and, er, some people think they saw the ghost of Catelyn Stark at Winterfell (no, really...). That last one might not have actually happened, but all of these did.
The battle that serves as the climax of the episode may be awesome, but the name is not. While they easily could've referred to it as The Field of Fire - an historic Westeros event that this heavily mirrors - or some variation of that, they've instead chosen to call it The Loot Train Attack/Battle in an official capacity. Game of Thrones wikia, meanwhile, lists it as the equally unexciting Battle of Tumbleton (although that itself does at least reference the Dance of the Dragons).