What is probable spam on X

Probable spam" on Twitter/X (now just called X) refers to a label and filtering mechanism used by the platform's algorithm to identify and hide replies (and sometimes other content) that it considers potentially low-quality or spammy.

You most commonly see it as a button or prompt in comment threads that says "Show probable spam" (or similar wording like "Show more replies" changed to this in mid-2024). Clicking it reveals hidden replies that X's system has flagged.

What does X say about these replies?

🔸 These are replies identified as potentially lower quality and spam.

🔸 The labeling is based on factors like: The author's previous behavior on the platform, the content of the reply itself.

X's goal is to prioritize "relevant, credible, and safe" content in conversations, while pushing suspected lower-quality stuff behind this extra click and this is where your replies will always disappear to if you don't start caring about what you share.

It's part of broader efforts to fight platform manipulation, bot activity, bulk unsolicited replies, repetitive content, and similar spam-like patterns.

Many of my colleagues  report issues that the filter is often over-aggressive that it frequently hides  normal, legitimate replies (even from verified/X Premium subscribers).

Others complain that genuine conversations get buried under "probable spam," sometimes including dissenting or critical opinions.

The bitter truth new accounts, low-follower accounts, or those that follow/like/reply very actively can get flagged more easily as well as being deboosted.

Your own replies might end up hidden in other people's threads if the system gives your account a lower "trust" score (sometimes called "tweepcred" informally).

It's not the same as a full account-level spam suspension or restriction (where you can't post at all). It's more about visibility and reach limiting for individual posts/replies.

Tip if your replies keep landing in "probable spam" sections:

1. Avoid rapid mass-following, mass-liking, or repetitive posting patterns

2. Build engagement more gradually

3. Check X's spam policy to avoid borderline behavior. Which is not limited to account suspension 

Overall, it's X's current (somewhat controversial) way of trying to clean up noisy threads but a lot of people think it's doing more harm than good to real discussions.