Final answer:
On community platforms, blogs, events, and videos are standard features used for content sharing and user engagement. Teleconferencing, however, is not typically included as it is designed for live, real-time communication on dedicated virtual meeting and collaboration platforms.
Step-by-step explanation:
The question 'What isn't included on Communities?' seems to refer to features commonly found within digital community platforms. Here, the specific platforms or 'Communities' being referred to are not mentioned, but in a general sense, many online community platforms include blogs, events, and videos.
These are often fundamental components for sharing information and engaging users. On the other hand, teleconferencing is not typically included as a standard feature on community-focused platforms, which are more about asynchronous communication and content sharing rather than live communication. Instead, teleconferencing is more commonly found in platforms designated for virtual meetings and real-time collaboration.