Making the field required in Object Manager is the simplest way to enforce that a value is entered every time a record is created or edited.

The place where the associate can learn more about an app to see if it would be a good fit for a business need is the AppExchange. The AppExchange is a marketplace where users can find, install, and review apps, components, and solutions that are built on the Salesforce platform and are available for various purposes and industries. The associate can browse the AppExchange by category, rating, price, or keyword, and see the details, features, screenshots, and reviews of each app. Trailhead is a learning platform where users can learn new skills and earn badges and certifications, but it does not provide information about specific apps. Global Search is a feature that allows users to find records and other items in their Salesforce org, but it does not search for apps outside their org.