Sessions are visits to your Amazon.com pages by a user. All activity within a 24-hour period is considered a session.
Clicks
The number of times your ads were clicked. Learn more more about traffic validation.
Once identified, it may take up to 3 days to remove invalid clicks from your reports. Clicks from the last three days may be adjusted due to click invalidation.
可是后台数据报告不是这样的,PPC广告Click点击率比整个asin的session都高，请高人指点.
具体的数据是这样的 ASIN:XXXXXYYY
一周的session 是 31
两周的Session 是 76
一周的广告Click是49
两周的广告Click是87
Clicks
The number of times your ads were clicked. Learn more more about traffic validation.
Once identified, it may take up to 3 days to remove invalid clicks from your reports. Clicks from the last three days may be adjusted due to click invalidation.
Session 24 小时内，一个用户无论 浏览同一个页面 多首次都只算一个session.
Clicks 中有一部分是invalidation clicks，比如 短时间内 重复点击，机器点击等，移除需要3days的时间。
所以， 广告clicks 高于session的原因有：
1、广告clicks包含无效点击，且尚未移除
2、 用户存在24小时内点击同一广告 多次的行为。（主要原因）
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