Saving your edits in the quiz builder doesn't update your live quiz by itself. For a published quiz, changes only go live when you republish:
Click Update — In the quiz builder's title bar, click Update after making your edits. (For a quiz that isn't live yet, the button says Publish instead.) This pushes the latest version to your storefront.
Give it a minute — Your storefront may briefly show a cached version. Wait a minute or two, then do a hard refresh (Ctrl + Shift + R on Windows, Cmd + Shift + R on Mac), or open your store in an incognito/private window.
Confirm the quiz is published — In My Quizzes, check that the quiz status is Published. Draft quizzes never appear on the storefront.
Note: if the quiz is part of an active A/B test, it can't be updated or unpublished on its own while the test is running. End the test first (or declare a winner) on the A/B test page, then make your changes.