| Tier | A purchasable advertising plan you define (name, price, weight). Advertisers subscribe to a tier. |
| Tier price | A specific recurring price on a tier (amount, currency, interval). Prices are immutable, so old subscribers keep the price they bought. |
| Field | A publisher-defined piece of creative (a tagline, a banner image, a discount code) beyond the fixed name and URL. |
| Slug | A field’s machine key (for example bannerImage). It is the key your SDK reads from ad.meta. It never changes, even when the field is renamed. |
| Weight | A tier’s frequency dial. Higher weight means a larger share of impressions in rotation. |
| Meta | The advertiser’s filled-in field values on a served ad, keyed by field slug. |
| Advertiser | The party buying placement. Advertisers are anonymous and email-only at this stage, with no login. |
| Subscription | The recurring Stripe subscription behind an ad. An ad serves only while its subscription is active. |
| Serving | An ad is serving when it is approved and its subscription is active or trialing. |