Thanks for the feedback report. It's great!!

LGTM1 to extend the OT to M97


On Sat, Oct 30, 2021, 00:37 John Delaney <johni...@chromium.org> wrote:

> > We're inclined to extend this OT, but wanted to quickly check in to see
> if y'all have any interim results from the trial thus far. Are you
> surveying developers? Is there some feedback you could perhaps aggregate to
> give us a sense for how it's going?
>
> Most definitely! We have received a lot of great feedback from people
> testing the API. In general we have been receiving two categories of
> feedback from the Origin Trial: accuracy of API reports, feedback on
> whether certain use-cases are met.
>
> See https://github.com/WICG/conversion-measurement-api/issues/201 for
> some exemplary feedback.
>
> Feedback on accuracy:
>
> Testers have identified some differences between our API and cookie based
> conversions, where the browser either doesn't send a report when expected /
> or sends an unexpected. We are continuing to explore this space and are
> making progress.
>
> See
> https://developer.chrome.com/docs/privacy-sandbox/attribution-reporting-data-clearing/
> which deep dives into learnings regarding data clearing from the OT.
>
> In Chrome 94 we changed the way that Chrome retries reports, and have
> marked improvement in the accuracy of API reports as seen by some testers.
>
> In general, we are hearing that integrating/verifying the API comes with
> its own set of challenges due to how different it is from the status quo.
> We are actively collaborating to improve the API in this regard (
> https://github.com/WICG/conversion-measurement-api/issues/174)
>
> Use-case feedback:
>
> The other key area of feedback we are receiving is use-cases not
> recoverable in the API. As developers have dug into the API, they have
> raised changes the API will need to work as expected.
>
> Some examples:
>
>
>    - Adding coverage for ads which navigate using window.open
>       - https://github.com/WICG/conversion-measurement-api/issues/77
>    - Allowing attribution to be scoped more granularly than "site"
>       - https://github.com/WICG/conversion-measurement-api/issues/115
>    - Adding more ergonomic ways to provide data to the API
>    - https://github.com/WICG/conversion-measurement-api/issues/261
>
> We still have active development to cover cases like these which come up
> in practice.
>
> Please let me know if there is anything specific you would like us to
> speak to!
>
> John
>
> On Thursday, October 28, 2021 at 3:34:33 PM UTC-4 Alex Russell wrote:
>
>> hey John,
>>
>> In line with the policy we adopted earlier regarding trials in this
>> bucket of features [1], I appreciate the reporting around total page loads.
>>
>> We're inclined to extend this OT, but wanted to quickly check in to see
>> if y'all have any interim results from the trial thus far. Are you
>> surveying developers? Is there some feedback you could perhaps aggregate to
>> give us a sense for how it's going?
>>
>> Thanks,
>>
>> Alex
>>
>> [1]:
>> https://groups.google.com/a/chromium.org/g/blink-dev/c/c4noVavt-uM/m/OhB3cd0EAgAJ
>>
>> On Thursday, October 21, 2021 at 6:45:39 AM UTC-7 John Delaney wrote:
>>
>>> *Contact emails*
>>> johni...@chromium.org, csharri...@chromium.org
>>>
>>> *Explainer*
>>>
>>> https://github.com/WICG/conversion-measurement-api/blob/main/event_attribution_reporting_clicks.md
>>>
>>> *Design docs/spec*
>>> https://wicg.github.io/conversion-measurement-api/
>>>
>>> *Summary*
>>> This is a new API for measuring conversions (e.g. purchases) and
>>> attributing them to clicked ads, without using cross-site persistent
>>> identifiers like third party cookies.
>>>
>>> *Link to “Intent to Prototype” blink-dev discussion*
>>>
>>> https://groups.google.com/a/chromium.org/d/msg/blink-dev/7B0ldtZR_68/GjLBu0n4DgAJ
>>>
>>> *Link to “Intent to Experiment” blink-dev discussion*
>>>
>>> https://groups.google.com/a/chromium.org/d/msg/blink-dev/Ib9-tDFitns/Sm9RXTNaBwAJ
>>>
>>> First extension:
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/C0P7ePjITJQ/m/ZYFmn30SDQAJ
>>> <https://groups.google.com/a/chromium.org/g/blink-dev/c/C0P7ePjITJQ/m/ZYFmn30SDQAJ>
>>> Second extension:
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/xCWP1ltlAgw/m/acwN0GIRBQAJ
>>> Third extension:
>>>
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/DmsUL3KHqMk/m/J2v3I_aEBAAJ
>>>
>>> *Goals for experimentation*
>>> We hope to see that the data produced by the API is comparable to
>>> existing cookie-based mechanisms.
>>>
>>> *Experimental timeline*
>>> We'd like to extend the origin trial for 3 milestones, continuing
>>> through Chrome 97 (95/96/97). The experiment has been running from Chrome
>>> 86-94.
>>>
>>> *Any risks when the experiment finishes?*
>>> This API is only additive and does not affect any existing state.
>>> Current conversion measurement solutions will work as expected with and
>>> without the API, so we don’t believe there are any risks.
>>>
>>> The Origin Trial tokens for Chrome 94 expired on October 12th. The API
>>> has been effectively disabled since then, so there will be a gap in
>>> availability.
>>>
>>> We have previously requested an exception to the .5% page load usage
>>> limit for Origin Trials. Page load usage is currently around .48% in
>>> October, and was at .5% on average in September.
>>> https://chromestatus.com/metrics/feature/timeline/popularity/3365
>>>
>>> *Reason this experiment is being extended*
>>> We have two more non-google testers interested in experimenting with the
>>> API who have not yet been able to start experiments. The proposed API is
>>> fundamentally different in a number of ways from cookie-based mechanisms,
>>> which can make setting up experiments time consuming.
>>>
>>> Given the wide range of environments where this API will be used, we
>>> expect new testers to produce different learnings and feedback on the API,
>>> even without changes to the API.
>>>
>>> *Ongoing technical constraints*
>>> None.
>>>
>>> *Will this feature be supported on all five Blink platforms supported by
>>> Origin Trials (Windows, Mac, Linux, Chrome OS, and Android)?*
>>> Yes.
>>>
>>> *Link to entry on the feature dashboard*
>>> *https://chromestatus.com/feature/6412002824028160
>>> <https://chromestatus.com/feature/6412002824028160>*
>>>
>>> --
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