T-shaped marketer
A T-shaped marketer is deep in one thing and broad across many, where the breadth is raw material for the depth rather than time away from it.
How it works
In some work an unrelated afternoon is time off; in marketing it is often material, because the job runs on noticing how people actually behave and that happens everywhere. The test is the trade, not the temperament: where breadth feeds the deep leg, range is a professional asset and not a lack of focus. The source claims this for marketing and its opposite for logistics, and establishes no rule for other trades.
What it changes for a personal brand
Name the one thing you are deep in. Run your last month of off-topic pieces against it and mark which ones come back to it as material. Where a piece does not come back, it is a second subject sitting beside your first: either give it a line that returns it, or stop counting it as the same body of work.