Becky Sharp, an ambitious and cunning social climber, navigates the rigid hierarchies of 19th-century British society to secure her fortune and status. Driven by a desire to escape her impoverished origins, Becky utilizes her wit and manipulative charm to infiltrate the upper echelons of London society. She faces opposition from the entrenched aristocracy and the moralistic expectations of her peers, particularly the naive Amelia Sedley. The narrative employs an omniscient, intrusive narrator who frequently breaks the fourth wall to comment on the vanity and hypocrisy of the characters, framing the story as a puppet show of human folly.

Readers and critics frequently highlight the sharpness of Thackeray's wit and his ability to construct a sprawling, cynical view of Victorian society. Discussion often centers on the moral ambiguity of Becky Sharp, who remains one of the most debated characters in English literature due to her lack of traditional virtue. The pacing is noted for its deliberate, expansive nature, which allows for deep character studies rather than rapid plot progression. Many observers emphasize that the book functions effectively as a critique of the vanity inherent in human ambition and social climbing. The balance between the satirical tone and the underlying tragedy of the characters' choices remains a focal point for academic analysis.