Mastodon's moderation could be greatly improved by a system to automatically flag posts containing certain words, phrases or links.
It would allow admins to instantly see problematic content (abuse, spam, etc) without having to wait for reports from users. It doesn't have to automatically take action, just flag it.
There's an existing issue in Mastodon's Github. If you are comfortable using Github, give it a thumbs up if you want this feature: https://github.com/mastodon/mastodon/issues/31182