Outside of Settings, Admin, Community Health, and a couple of functions reserved for Community Owners and Facilitators (e.g., Accolades and Pinning to the Top), nearly all of the main Yellowdig functionality is the same as what students use and see. The functions that you will use to interact in your Community Feed (Posting, Commenting, Upvoting, attaching Topics, etc.) are all identical to those of your students. See Yellowdig Functions: A Quick Start Guide for overviews of these functions.
The activity of instructors and TA's can have a significant positive impact on student motivation and the types and quality of content that students post, so we always recommend that instructors try to spend at least a little bit of time Upvoting, awarding Accolades, and leaving quick Comments (e.g., "Excellent analysis!"). Community Owners and Facilitators who interact in the Community will accumulate points and have their activity tracked just like students, so one way to monitor and improve your own interaction is to set your own point or Post/Comment goals. To understand how the point system and other social functions work to accumulate points, see the Learner section of the Knowledge Base.