Update: we've discovered a stability issue with the Topics API and fixed
the code, but the Topics API has been disabled in the Privacy Sandbox Ads
APIs Origin Trial for users that aren't running a version of Chrome with
the fix applied. It will take a couple of weeks for the updated
canary/dev/beta releases to propagate to the majority of users.

Best,

Josh

On Wed, Mar 30, 2022 at 11:58 AM Philip Jägenstedt <foo...@chromium.org>
wrote:

> I was not clear about the connection between this intent and 2 other
> intents that are under review now.
>
> While my LGTM stands, please make sure that the total package of 3 make
> sense :)
>
> On Wed, Mar 30, 2022 at 5:49 PM Philip Jägenstedt <foo...@chromium.org>
> wrote:
>
>> LGTM to experiment
>>
>> On Fri, Mar 25, 2022 at 10:31 PM Josh Karlin <jkar...@chromium.org>
>> wrote:
>>
>>> Contact emails
>>>
>>> yao...@chromium.org, jkar...@chromium.org
>>>
>>> Developers interested in the Topics API can also join the Topics API
>>> announcements
>>> <https://groups.google.com/a/chromium.org/g/topics-api-announce> group
>>> for updates and announcements.
>>>
>>> Explainer
>>>
>>> https://github.com/jkarlin/topics
>>>
>>> Specification
>>>
>>> TBD
>>>
>>> Summary
>>>
>>> The intent of the Topics API is to provide callers (including
>>> third-party ad-tech or advertising providers on the page that run script)
>>> with coarse-grained advertising topics that the page visitor might
>>> currently be interested in. These topics will supplement the contextual
>>> signals from the current page and can be combined to help find an
>>> appropriate advertisement for the visitor.
>>>
>>>
>>> Blink component
>>>
>>> Blink>InterestCohort
>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EInterestCohort>
>>>
>>> Search tags
>>>
>>> Topics <https://chromestatus.com/features#tags:Topics>, browsingTopics
>>> <https://chromestatus.com/features#tags:browsingTopics>, FLoC
>>> <https://chromestatus.com/features#tags:FLoC>
>>>
>>> TAG request
>>>
>>> https://github.com/w3ctag/design-reviews/issues/726
>>>
>>> Risks
>>> Interoperability and Compatibility
>>>
>>> Gecko: issue <https://github.com/mozilla/standards-positions/issues/622>
>>> – requested March 17th 2022
>>>
>>> WebKit: webkit-dev thread
>>> <https://lists.webkit.org/pipermail/webkit-dev/2022-March/032159.html>
>>> – requested March 17th 2022
>>>
>>> Web developers: Lots of interest in issues in the explainer. Concerns
>>> center around utility. Balancing privacy/utility and making tweaks to the
>>> algorithms so that we get this right is what the OT is all about.
>>>
>>> Other signals:
>>>
>>> WebView Application Risks
>>>
>>> Does this intent deprecate or change behavior of existing APIs, such
>>> that it has potentially high risk for Android WebView-based applications?
>>>
>>> No
>>>
>>>
>>> Goals for experimentation
>>>
>>> The intent is for experimenters to try Topics out and see how it
>>> performs for them. We expect there to be bumps along the road toward
>>> optimizing privacy and utility trade-offs. We also expect it may be
>>> necessary to change parameters and algorithms along the way (e.g., we’re
>>> already having discussions around adding Topics in request headers and
>>> weighting topics by frequency). So please experiment and provide feedback
>>> on the issue tracker <https://github.com/jkarlin/topics/issues> to help
>>> us improve it.
>>>
>>> Experiment Configuration
>>>
>>> The origin trial for this experiment will be shared among various
>>> Privacy Sandbox APIs. Our goal is to allow for coordinated experiments to
>>> be run by multiple different sites, across multiple APIs in one OT.
>>>
>>> This shared origin trial, Privacy Sandbox Ads APIs, will be a
>>> third-party origin trial. To ensure that developers can run coordinated
>>> experiments without concern for exceeding page load usage thresholds, this
>>> Origin Trial will be available for a subset of users by default. Therefore,
>>> it will be necessary to feature test to ensure that the API surface you
>>> want to use is available after providing your OT token. A second advantage
>>> of this configuration is that different experimenters will experiment with
>>> the same users, which enables coordination for APIs like FLEDGE across
>>> third parties.
>>>
>>>
>>>
>>> Reason this experiment is being extended
>>>
>>> N/A
>>>
>>> Ongoing technical constraints
>>>
>>> Debuggability
>>>
>>> There are no particular debugging APIs made available or dev-tools
>>> integrations for this OT.
>>>
>>>
>>> Will this feature be supported on all six Blink platforms (Windows, Mac,
>>> Linux, Chrome OS, Android, and Android WebView)?
>>>
>>> All but webview.
>>>
>>> Is this feature fully tested by web-platform-tests
>>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>>> ?
>>>
>>> Not yet, but those tests are coming.
>>>
>>> Flag name
>>>
>>> privacy-sandbox-ads-apis
>>>
>>> Requires code in //chrome?
>>>
>>> False
>>>
>>> Launch bug
>>>
>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1286877
>>>
>>> Estimated milestones
>>>
>>> We hope to start the Origin Trial sometime during M101 beta. We plan to
>>> continue the Origin Trial until at least M104 to give developers time to
>>> test the API and provide feedback. Once we are confident that the APIs are
>>> working properly, we will transition the OT from beta to stable channel.
>>>
>>> Link to entry on the Chrome Platform Status
>>>
>>> https://chromestatus.com/feature/5680923054964736
>>>
>>> Links to previous Intent discussions
>>>
>>> Intent to prototype:
>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/b845db21-f158-4bf3-9109-7f4665126ec1n%40chromium.org
>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/b845db21-f158-4bf3-9109-7f4665126e...@chromium.org>
>>>
>>>
>>> This intent message was generated by Chrome Platform Status
>>> <https://chromestatus.com/>.
>>>
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>>> .
>>>
>>

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