Continue to contribute meaningful content too. :)
This is big.
Spammers take over when people visit a community, see it's ONLY SPAM, and leave. But if they see the community as a place worth supporting, they'll help clean up the mess.
If volunteering as a mod in the comms you care about is not an option (though you should consider it), the only thing you can do is report the post, block the user and move on.
Also consider donating to the lemmy developers and make them aware in any way that you can that you want them to work on moderation tools.
And of course downvote so that fewer users see it
reporting absolutely helps. it increases visibility for content that slipped through automated moderation and having more reports for content indicates urgency.
Sort by new and report what you see. If you notice a pattern (same website, similar names, etc...), add it in the report description.
Downvote spam
Report
I reckon you could avoid posted spam.
