The community tab is found in the top right of the application screen. Its a place to share resources, keep up to date with what your colleagues are making and to get news of updates and ideas.
The main panel of the home page shows the current featured activity. This is a high quality activity that was easy to make. The purpose is to give you inspiration to make your own activities. It also shows top downloads and recent uploads.
The top-right box gives you a link return to the home page. It also gives you links to view resources that you have made and also to see those made by others at your school.
Over on the far right is the news feed. As well as other general news, you'll be kept informed when colleagues are uploading resources and when others are commenting on resources you have uploaded.