Peak-End Rule
People judge an experience mostly by how they felt at its most intense point and at its end.
What it means on a web page
The error states, success screens, and checkout confirmation are disproportionately important to how users remember the overall experience.
Error and success states weigh heavily in how an experience is remembered, so a weak one can colour the whole impression.
This describes a general tendency. How much it matters on a particular page depends on the page and the people using it.
Does theuxbites check this?
No. This cannot be judged from a page's HTML, so the audit does not check it and never reports a finding for it. It is described here for when you review a design yourself.
Suggestions
Design exceptional error states and success screens. Make the hardest moment empathetic and the final moment memorable.
- Write error messages that explain what went wrong and how to fix it
- Add a warm, human success screen after form submission or purchase
- Include next steps or related suggestions on success screens
- Treat 404 and error pages as brand touchpoints, not dead ends
- Test with users: ask how they felt after completing the main task
These are common ways to apply the principle, not rules. Whether one fits depends on your page.
See how your page does
An audit checks nine other UX principles on your page, together with speed, accessibility, SEO and AI visibility.