Final answer:
Notifications for subscribed articles are typically sent upon new content publication or updates. Checking with libraries can provide access when facing paywalls or when content is not freely available.
Step-by-step explanation:
When you subscribe to knowledge articles, notifications for new content are usually sent out via email or directly through the platform's notification system. The timing of these notifications can vary, however, they are typically sent when new articles are published or when there are important updates to existing content. To avoid missing out on useful resources, especially if you are hitting a paywall, checking with your school or local libraries for access is a good alternative. Additionally, libraries may provide interlibrary loan services for resources that are not immediately available online.