The hardest text any marketer writes is the one about themselves. We can write for a client and write for a product, and then we open the About field and type passionate digital marketer focused on growth, a sentence that says nothing about anybody.
This is not about personal branding as a whole. It is about the text itself: what goes in a bio, a profile description, or the first two lines of a message, and the decisions that make it work.
The first two lines are what gets read
This is measured rather than asserted. Nielsen Norman Group's eyetracking research describes an F-shaped reading pattern: people read a horizontal line across the top, then a shorter horizontal line below it, then scan down the left side. The result is that the opening words of each block get the attention and the rest is skipped.
The recommendation that follows from it is direct: start with the words carrying the most information, so that someone who sees only the first two words still gets the point.
Apply that to your own bio. If a person read only the first six words, would they know what you do and who for? If not, the text needs reordering rather than decorating.
Write what you do, not what you love
Passionate about marketing is not information. Everyone in the field will say the same thing, so the sentence occupies space without separating you from anyone.
Replace it with something checkable. Not I love ads, but I run ad accounts for stores selling online. Not content expert, but I write content for clinics and training centres. The second version is less ambitious and far more useful, because it lets someone work out in three seconds whether you fit.
The structure that works, in three lines
In most places you do not need more than this.
First line: what you do and who for. Specific rather than general.
Second line: one proof. A number, a type of work, or a duration. Not a career history, one proof.
Third line: the step you want the reader to take. A message, a call, a link to work.
The common error is trying to fit an entire professional history into this space, which produces a long text of which a line and a half gets read, and those are precisely the line and a half with nothing useful in them.
The part people are afraid of: being specific
The objection I hear most is that specifying will lose me work. In practice the opposite usually holds, because general text reaches nobody and the reader cannot connect you to their problem.
Being specific is not a contract. You can take work outside what you wrote, and nobody audits a bio against it. The benefit is that the reader can decide, and a fast decision is in your favour even when it is a no, because it saves you a meeting that was never going anywhere.
If you cannot be specific because you do not yet know what you are known for, that is a bigger question than the text, and it is in personal branding for marketers, with the clearest format for positioning in how to write a brand positioning statement.
A bio is not a CV
These are not the same thing and they do not follow the same logic. A CV is read after somebody has decided they are interested. A bio is read so that somebody can decide whether they are interested at all.
So the bio filters and attracts, and the CV proves. Carrying the CV's tone into a bio produces a dry text that reads like a shortened career history, and carrying the bio's tone into a CV produces overstatement. The second half of that is in how to write a marketing CV.
Companies have the same problem
What you are doing here is exactly what a company does when it writes its positioning, and the failure modes are identical: generic language, trying to please everyone, and fear of narrowing. bdg-labs wrote the company version in their piece on B2B positioning for startups, and you will recognise the same mistakes word for word.
A ten minute exercise
Write your bio now. Then delete every adjective with no evidence behind it: professional, passionate, creative, distinguished, expert. Read what is left.
If very little is left, that is not a writing problem, it is information: you have been describing yourself with adjectives rather than with work. The fix is not better words. It is work you can point at, which is in how to build a personal brand without living online all day.
Three places, three versions
The same bio does not work everywhere, and people paste one version into all of them and then wonder why it produces nothing.
In a profile field, the space shown before the more link is very short, so anything past the first line effectively does not exist. In an introductory message to a client, the reader already knows why you are writing, so what is needed is one proof matched to their problem rather than your whole history. On a work or portfolio page you can finally go longer, because anyone who reached it is already interested.
The rule: the earlier the place sits in someone journey, the shorter the text. Most people do the opposite and write their longest version in the first place anyone sees.
Honest limits
Good text does not compensate for absent work. With nothing to point at, the best bio in the world produces messages that stop at the first request to see something you have done.
And a bio expires. What you wrote last year probably describes someone you are no longer. Give it a review date every six months rather than leaving it until you need it, because the moment you need it is the worst possible time to write about yourself.