Personalization works best when different users want different things from the same product. Look for situations where people have varied preferences, skill levels, or goals. Real personalization understands how individuals behave over time, not just their age or location.

Good candidates include content recommendations that learn what users like, interfaces that adapt to experience level, and features that reorganize based on what people actually use. Check if users already spend time customizing settings manually. This shows they want a personalized experience. Notice when a single design frustrates some users while working fine for others.

Make sure user behavior gives enough signals to personalize meaningfully. Watch out for privacy concerns and filter bubbles that trap users in narrow experiences. Start small with personalization users can turn off easily. Music playlists, news feeds, and learning platforms show this done well. Don't personalize things that need to stay consistent, like emergency buttons or main navigation. Always let users control how much personalization happens.