A media kit is a short, dated document that tells a brand who you are, who watches, what you make, what you charge, and how to brief you.
What belongs in it
Bio, formats, audience snapshot (honest, dated), two or three work samples, rate card or starting ranges, contact, and any constraints (no alcohol, no political ads).
What does not
A 30-page autobiography. Fake screenshots. Rates from 2022.