# impact.comのデータ保持

impact.com が保持するデータの大部分は無期限に保持されますが、以下のデータ項目は指定期間のみ保持されます。

| データ項目        | 保持期間 |
| ------------ | ---- |
| クリックイベント     | 12か月 |
| インプレッションイベント | 12か月 |
| Postbidイベント  | 3か月  |
| 不正行為の集計データ   | 13か月 |


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