PostEaseWhat a style guide needs to cover
A useful style guide is shorter than it sounds: a brand voice description (a handful of adjectives and real example posts, not abstract language), formatting conventions (how hashtags are used, how emoji are handled, capitalization), and a short list of words or phrases to avoid. It exists to settle small, recurring decisions once instead of relitigating them in every review.
Real examples teach faster than abstract rules
A guide that says "be conversational but professional" gives almost no actionable guidance. A guide that shows two real example posts, one that hits the mark and one that misses, teaches the distinction far faster than an adjective ever could. Build it around examples from the account's own history, not hypothetical ones, and it becomes concrete immediately.
It matters more as more than one person touches the account
A single person managing their own account rarely needs a written style guide. The voice lives in their head. Once a second person, a freelancer, or an agency is involved, a written guide is what keeps the voice consistent across everyone touching the account, rather than drifting toward whichever writer worked on it most recently.