How would you apply progressive disclosure to UI copy and tooltips?

WHAT THIS TESTS: Whether you treat copy as an information architecture problem, not just a wording problem. Interviewers want to see that you know how to reduce cognitive load by splitting primary from secondary information, and that you understand the trade-off between discoverability and simplicity. The question specifically checks if you can apply the principle to microcopy like labels, tooltips, and help text rather than only to navigation or layout.

A GOOD ANSWER COVERS: Four things in order. First, the primary layer should show only the most important option names and one-line plain language descriptions so users know what a setting does without wading through edge cases. Second, concise tooltips should cover the eighty percent use case, answering the most likely question in one sentence. Third, advanced or rarely needed details such as permission requirements, downstream consequences, or niche configuration options should be deferred to an expandable Learn more section, a secondary sheet, or a progressive tooltip. Fourth, the candidate should explicitly connect this tiering to cognitive load by citing that visible items signal importance, that novices avoid mistakes when they are not forced to scan irrelevant details, and that experts save time because they do not have to read past explanations they already know.

COMMON WRONG ANSWERS: Three red flags stand out. One, suggesting that all help text should be visible inline to minimize clicks, which ignores the NN/G finding that hiding advanced features helps novices prioritize and reduces error rates. Two, describing progressive disclosure only as a visual design or navigation pattern without mentioning how the copy itself must be rewritten for each tier. Three, failing to explain how the split reduces cognitive load, usually by giving a vague answer like it makes the UI cleaner instead of referencing learnability, efficiency, or error rate.

LIKELY FOLLOW-UPS: The interviewer may ask how you decide what belongs in the primary versus secondary layer, so be ready to say you use frequency of use and risk of harm as your split criteria. They may also ask how you handle discoverability for the hidden content, which is a good moment to mention clear link labels like Advanced print settings rather than vague terms like More. A third follow-up could be how you measure whether your disclosure split is working, where you should mention task success rates for novices and time-on-task for experts.

ONE CONCRETE EXAMPLE: Imagine a cloud storage settings page with a sync frequency toggle. The primary layer shows the label Sync files and a short tooltip Files update automatically every hour. A secondary expandable link labeled When real-time sync is available and what it costs reveals that continuous sync drains battery and requires a Business plan. This keeps the default view scannable, signals that hourly sync is the standard path, and protects novices from accidentally enabling a battery-intensive option while still making the power user feature discoverable.

Source: nngroup.com