[Home](./index.md) > [@firebase/analytics](./analytics.md) > [Promotion](./analytics.promotion.md) ## Promotion interface > Warning: This API is now obsolete. > > Use Item instead. > Field previously used by some Analytics events. Signature: ```typescript export interface Promotion ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [creative\_name?](./analytics.promotion.creative_name.md) | string | (Optional) | | [creative\_slot?](./analytics.promotion.creative_slot.md) | string | (Optional) | | [id?](./analytics.promotion.id.md) | string | (Optional) | | [name?](./analytics.promotion.name.md) | string | (Optional) |