[null,null,["最后更新时间 (UTC):2025-08-21。"],[[["\u003cp\u003eChrome provides testing modes that allow sites to preview behavior without third-party cookies, and these modes are reflected in bid requests via cookie deprecation labels.\u003c/p\u003e\n"],["\u003cp\u003eChrome's cookie deprecation label is represented in the \u003ccode\u003ecookie_deprecation_label\u003c/code\u003e field within the \u003ccode\u003eBidRequest.Device\u003c/code\u003e message for Google Authorized Buyers and in the \u003ccode\u003eBidRequest.device.ext.cdep\u003c/code\u003e field for OpenRTB.\u003c/p\u003e\n"],["\u003cp\u003eBidders can utilize pretargeting to filter for bid requests containing specific Chrome cookie deprecation labels, enabling them to test various scenarios and adapt bidding strategies accordingly.\u003c/p\u003e\n"],["\u003cp\u003eThe availability of Chrome deprecation labels is subject to user privacy controls and may be absent if personalized advertising is opted out of.\u003c/p\u003e\n"],["\u003cp\u003eSupported labels for pretargeting include those for both Mode B (e.g., 'control_2', 'treatment_1.1') and Mode A (e.g., 'control_1.1', 'label_only_1').\u003c/p\u003e\n"]]],["Chrome provides cookie deprecation labels in bid requests within testing modes. These labels, found in `BidRequest.Device.cookie_deprecation_label` (Authorized Buyers) and `BidRequest.device.ext.cdep` (OpenRTB), allow bidders to identify requests impacted by cookie deprecation. Bidders can use pretargeting to filter for requests with specific labels. Supported labels are divided by Mode (A or B), e.g., `label_only_3`, or `control_2`. Availability is subject to privacy controls.\n"],null,["# Third-party cookie deprecation labels\n\nAs part of [Chrome-facilitated testing](https://developer.chrome.com/docs/privacy-sandbox/chrome-testing/?utm_source=devtools)\n, Chrome provides testing modes that allow sites to preview site behavior\nwithout third-party cookies. To help bidders test, bid requests contain Chrome's\n[cookie deprecation labels](https://developers.google.com/privacy-sandbox/setup/web/chrome-facilitated-testing#mode_a_labeled_browser_groups).\nBidders can also use pretargeting to filter for requests that contain cookie\ndeprecation labels.\n\nFor information on how Google Ad Manager handles cookie deprecation labels,\nsee the [Google Ad Manager Help Center](https://support.google.com/admanager/answer/13178817#zippy=).\n\nBid Request\n-----------\n\n### Google Authorized Buyers bid request protocol\n\nChrome's cookie deprecation label is represented in the\n`cookie_deprecation_label` field in the `BidRequest.Device` message. This field\nis available in the [open beta version of the protocol](https://developers.google.com/authorized-buyers/rtb/downloads/open-beta/realtime-bidding-proto).\n\nHere's the definition: \n\n message BidRequest {\n ...\n message Device {\n ...\n // Chrome-facilitated cookie deprecation testing label as provided by\n // Chrome.\n // https://developer.chrome.com/en/docs/privacy-sandbox/chrome-testing/\n optional string cookie_deprecation_label\n }\n optional Device device\n }\n\n### OpenRTB Protocol\n\nChrome's cookie deprecation label is provided in the OpenRTB\n`BidRequest.device.ext` message. Here is the definition: \n\n message DeviceExt {\n ...\n // Chrome-facilitated cookie deprecation testing label as received from\n // Chrome.\n // https://developer.chrome.com/en/docs/privacy-sandbox/chrome-testing/\n optional string cdep;\n }\n\n### Example\n\nHere's an example of how Google Authorized Buyers and OpenRTB protocols\nrepresent Chrome provided labels. If Chrome returns `label_only_3`:\n\nGoogle Authorized Buyers protocol BidRequest: \n\n device {\n cookie_deprecation_label: \"label_only_3\"\n }\n\nOpenRTB BidRequest: \n\n {\n \"device\": {\n \"ext\": {\n \"cdep\": \"label_only_3\"\n }\n }\n }\n\nThis extension is available in the [open beta version of the protocol](https://developers.google.com/authorized-buyers/rtb/downloads/open-beta/openrtb-adx-proto).\n\n### Availability\n\nThe presence of Chrome deprecation labels in the bid request is subject to\nexisting privacy protections and controls. For example, the Chrome provided\nlabels are unavailable if the user opts out of personalized advertising.\n\nPretargeting dimension\n----------------------\n\n| **Note:** This pretargeting dimension is supported for all bidders. Interested bidders can reach out to their account manager to request to turn on this feature.\n\nBidders can set a new pretargeting dimension on the pretargeting configuration\nto filter for the requests that have [Chrome labels](https://developers.google.com/privacy-sandbox/setup/web/chrome-facilitated-testing)\n. Each pretargeting configuration can contain one or more labels.\n\nThe supported labels are:\n\n|----------|------------------------------------------------------------------------------------------------------------------------------------------------------|\n| **Mode** | **Labels** |\n| B | - `control_2` - `treatment_1.1` - `treatment_1.2` - `treatment_1.3` |\n| A | - `control_1.1` - `control_1.2` - `control_1.3` - `control_1.4` - `label_only_1` - `label_only_2` - `label_only_3` - `label_only_4` - `label_only_5` |\n\nFor example, if a pretargeting configuration has `[label_only_3, label_only_4]`,\nthen the pretargeting configuration matches when a request contains either\n`label_only_3` or `label_only_4`."]]