Checkout Psychology

Checkout is where “do I want this?” turns into “is this worth it?” And every line on that page, from the shipping fee to the progress bar, is built to tip the answer toward yes.

This pillar breaks down those final-step tricks: the thresholds, fees, defaults and add-ons that decide whether a cart gets bought or abandoned. No theory for its own sake. Each file covers what’s happening in the buyer’s head, why it works, and how to use it (or spot it) in your own checkout.