Begin with the audience
Consider where people will discover the experience, which devices they use, and whether the core task happens occasionally or frequently.
Match the platform to the task
A website can explain and connect; a web application can support richer tasks in a browser; a mobile app may suit repeat use or device-specific capabilities. The right mix depends on the problem.
Plan for maintenance
Consider content updates, integrations, accessibility, testing, and support alongside the initial build. A smaller, well-maintained first step can create room to learn.