X (Twitter) Audience Glossary
Mutuals, reply guys, niches, build-in-public, personal brand — the relationship terms that govern how audiences form and compound on X.
8 terms in this category
Build in public
The practice of openly sharing the process, metrics, and decisions behind a project as it develops.
Follower-to-following ratio
The ratio of accounts that follow you vs. accounts you follow back — a rough proxy for influence.
Mutuals
Accounts that follow you while you follow them back — a mutual-follow relationship.
Niche
The specific topic or audience an X account focuses on.
Personal brand
The reputation, voice, and topical association that distinguishes an account from generic content.
Reply guy
A user who builds an audience by replying early and substantively to large accounts.
Superfan
The top ~1-3% of your followers who engage with most of your content and drive most of your conversions.
X List
A curated collection of accounts that you can follow as a separate timeline.
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