运营者术语表

Amazon audiences（亚马逊预置人群包：in-market / lifestyle / interest）

亚马逊用自家购物与流媒体行为预先做好的人群包；Sponsored Display 下是四类——in-market、interest、lifestyle、life event，DSP 的目录更宽；广告主设不了回溯窗口。

最常见的错，是把 in-market 当成一个自己能调的意图旋钮。views 和 purchases remarketing 可以自己设 lookback，Amazon audiences 只认 audienceSameAs 一个条件，没有窗口；亚马逊也从没公布过它自己用的回溯天数，圈里流传的“in-market 是 30 天”没有任何亚马逊官方文档写过，只能当坊间说法。想知道它到底有多新，就拿一个自己设了 lookback 的 purchases remarketing 人群平行跑，看差值。还有两个坑：人群规模给的是 dailyReach 预测区间，有时只有下限，衡量的是可投放量而不是人头；亚马逊自己把这些人群摆在 awareness 和 consideration 阶段，用 SP 的 ACOS 标准去砍，砍掉的本来就不是按那个标准定价的量。

关键数字

费率与规则以官方英文原文为准，保留原文：

The audiences taxonomy endpoint returns four top-level categories for adType SD — In-market, Interest, Lifestyle, Life event — but nine for adType DSP, which adds Device, Demographic, Lookalike, Custom-built and Third-party, so the four-category framing is Sponsored Display's, not the DSP catalog.
Amazon audiences carry no advertiser-settable lookback: a Sponsored Display clause accepts only audience(audienceSameAs=...), while lookback is documented on views (7/14/30/60/90 days) and purchases (7/14/30/60/90/180/365 days) clauses, and Amazon does not publish the recency window its prebuilt segments use.
Audience size returns as a forecast, not a headcount — dailyReach inside inventoryForecasts, as a band that may carry both a lower and an upper bound or only a lower bound — and Amazon's DSP glossary defines daily reach as the total number of audience members who were shown an ad on a daily basis.

官方来源：Amazon Ads API — Audience insights usage example (DSP taxonomy sample, nine categories) · Amazon Ads API — Sponsored Display audiences (taxonomy, audienceSameAs, lookback tables) · Amazon Ads — Display ads guide (four categories, awareness and consideration)