Chefs search by species and volume. The words are specific — a name, a grade, the word wholesale — and a page written in that language is found by somebody placing a weekly order rather than browsing.
December is a different business. Households looking for shellfish delivered for a celebration search in enormous numbers for a fortnight, and a supplier without a retail page simply misses the whole season.
Seasonal questions are unanswered ground. When a species is at its best, why it disappears for months, how long it keeps alive: those pages are read all year and almost nobody writes them.
Supply is a city question. A kitchen wants to know whether delivery reaches its street by service time, so pages built around the towns actually served beat one page claiming national coverage.