How do "meta posts" talk about Reddit itself rather than external topics?

A meta post is a post whose subject is Reddit itself — its rules, culture, community dynamics, moderation decisions, or the behavior of its users — rather than any external topic. In a subreddit dedicated to, say, woodworking, a regular post shows a finished cabinet or asks about joinery techniques. A meta post asks why the subreddit's moderators removed a certain type of content, discusses whether a recent rule change is good for the community, or reflects on how the subreddit's culture has changed over time. The subject has turned inward. Meta posts serve several functions. They are the primary vehicle for community governance discussions — when moderators announce changes, seek feedback, or explain policy decisions, they use meta posts. They also surface when community members want to collectively diagnose problems: a spike in spam, a trend toward low-effort content, a perceived change in the quality of answers. These discussions would not fit naturally in a regular thread because they are not about the subreddit's nominal topic; they are about the subreddit as a social organism. Many subreddits require meta posts to carry a specific flair, or they restrict meta discussions to designated threads, or they route all meta conversation to a companion subreddit. This is because unmanaged meta posts can consume a community's attention and displace the content it was created to host. A woodworking subreddit buried in arguments about moderation decisions has stopped being a woodworking subreddit in any practical sense. At the platform level, subreddits like r/TheoryOfReddit, r/SubredditDrama, and r/modnews are explicitly meta — they exist to discuss Reddit as a whole. The platform's own official communication channels use meta posts to announce policy changes, and the community's response to those announcements often becomes a meta event in itself.