Sale type tells Tally what kind of sale this is, and that shapes everything downstream: which species you can consign, how lots are grouped, and which fees apply.
Weekly Cattle — the routine cattle run.
Special Sheep/Goat — small-ruminant sales.
Horse, Dairy Dispersal, Bred Cow — specialized events.
Mixed — when more than one species sells the same day.
Pick the type that matches the day; it's set when you create the sale.
Admin section
Permissions, locking rules, and setup — visible to admins.
Technical section
Data model, API, and internals — visible to developers.