Your social media bio is your first impression and your only chance to turn a profile visitor into a follower. Here is how to write one that works.
Every time you comment on a post, every time your name appears in search — those are invitations for a stranger to visit your profile. And the first thing they read is your bio. Most bios fail not because they are dishonest, but because they are forgettable. "Helping businesses grow" and "Entrepreneur | Speaker | Dad" are so common they have become invisible.
**Line 1 — what you do and who you help.** Not your title — what you *do* for people. Weak: "Marketing consultant." Strong: "I help SaaS startups cut their CAC by 30% with better email sequences." If you can answer "who do you help, with what outcome" — you have your first line.
**Line 2 — your proof or differentiator.** A specific result, credential, or body of work. One line, one specific thing. Vague proof ("years of experience") does not work.
**Line 3 — what they get by following.** Give people a reason to follow. Not who you are — what they *get*. "I post three times a week about lean marketing tactics for bootstrapped founders." This pre-qualifies your audience.
**Line 4 — a CTA or human touch.** Either a clear call to action or a human detail that makes you real. Not both.
Bluesky: 300 chars — prioritize the who-you-help line. X/Twitter: 160 chars — be surgical. Mastodon: no limit, can be narrative, hashtags are searchable. LinkedIn: your headline is your bio in search results — use positioning, not job title.
Specificity wins. Clarity wins. Generic loses. Rewrite yours, test for 30 days, and build the content system that backs it up at [socialmate.studio](https://socialmate.studio).
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