# SEO 結構化
[TOC]

## :triangular_flag_on_post: [屬性] offers: Product
### availability 產品供應情形
- BackOrder 延期交貨
- Discontinued 停產
- InStock 有存貨
- InStoreOnly 僅在店內
- LimitedAvailability 有限的可用率
- OnlineOnly 僅限在線
- OutOfStock 缺貨
- PreOrder 預購
- PreSale 預售
- SoldOut 售罄
### priceValidUntil 價格截止日
- yyy-MM-dd
### sku 庫存單位

## :triangular_flag_on_post: [屬性] offers: Course[^Courselink]
[^Courselink]:https://developers.google.com/search/docs/advanced/structured-data/course
### sameAs 連結
### provider 提供者
- CollegeOrUniversity 學院
- EducationalOrganization 教育機構
- Action
- CreativeWork
- EducationalOccupationalProgram
- Invoice
- ParcelDelivery
- Reservation
- Service
- Trip

## :triangular_flag_on_post: [屬性] offers: offer[^offerlink]
[^offerlink]:https://schema.org/Offer
### sku 庫存單位

參考資料：
[官方文件](https://developers.google.com/search/docs/advanced/structured-data/search-gallery)
[測試結構化資料](https://developers.google.com/search/docs/advanced/structured-data?hl=zh-tw)