I feel to maximize growth:

• Post daily at a time when most people are on Lemmy.
• Always try to include an interesting picture with the post. If you're sharing a URL, sometimes a thumbnail doesn't show or is uninteresting. In these cases, find a better picture and use that and move the URL to the body of the post.
• Shamelessly plug the community every chance you get. Speaking of which, !augmented_reality@lemmy.world