Not dumb at all. Right now your site lives only in the browser: it can show things, but it can't remember anything between visitors. Logins and orders need a place to be stored. That's what Supabase is:
- Database: a set of tables (customers, orders) that stays around.
- Auth: handles sign up, login, password reset, so you don't store passwords yourself.
- Storage: for files like product photos.
Cost: the free tier is enough for a bakery for a long time (free projects do pause after a week of no activity; paid plan starts at around $25/month when you need it).
Safety: it's a serious, widely used service. The one thing you must understand: Row Level Security (RLS). These are rules like "a customer can only see their own orders". Lovable usually creates them, but before real customers arrive, ask someone to check them, or post them here. That's where most small apps leak data, not in Supabase itself.