A quick summary, Astra is a Discord bot to help with moderation and user commands. Currently, the biggest features are the ability to automatically remove messages containing invite links, any links of any kind, and Phishing links from Discord automatically. There are also modules for pick-up games (Overwatch, etc), Polls, Giveaways, and manage member roles by assigning them for reactions and by command.
Have a better idea how to describe Astra on this page? Let me know!