Bids are caps unclear/inconsistent

prebid / Prebid.js

Setup and manage header bidding advertising partners without writing code or confusing line items. Prebid.js is open source and free.

https://docs.prebid.org

Apache License 2.0

1.28k stars 2.05k forks source link

Bids are caps unclear/inconsistent #13

Closed djlosch closed 8 years ago

djlosch commented 9 years ago

1) why are there different bid caps for granularity levels? If the true bid is $10.37, the granularity levels look like they'll respond with $5, $10.30, and $10.37 respectively. I'm not sure how is this useful, or why as a pub, we'd want this. We just want the $10.37.

2) is there any particular reason why bids are hard-capped at $20? We regularly break that limit on AdX meaning prebid.js would be handicapping itself regularly with non-competitive bids.

prebid commented 9 years ago

The $10.37 is also available via bidResponse.cpm. (in fact it can be $10.3723)
Granularity levels are helpful because each line item is assigned to a price (so that DFP can make header bidding line items compete with class 1 line items based on price). If the granularity is at $0.01, capped at $20, then you'd need 100_10=2000 line items. If you don't want to manage that many line items, set the granularity lower, say $0.50, then you'd have 2_10=20 line items.
99% of the bids are below $20 from our observation. We return the exact price in bidResponse.cpm as well, thus you can customize your granularity and cap.

djlosch commented 9 years ago

That makes a lot more sense. This issue is effectively a documentation clarification request then. I'd commit your response into the docs on prebid.org and make a pull request, but those docs aren't inside the repo.

99% of the bids are below $20 from our observation.

Certain audiences segments average well above $20 for IAB display. Using just a % of bids doesn't provide any weighting for value. For example, a single impression at $50 is worth the same as 1000 impressions at 5 cents.

prebid commented 9 years ago

Thanks for the suggestion! This is really helpful as we've heard the same feedback just over the weekend. I'll mark this ticket as a feature request and we'll get to it once a few other more urgent issues are fixed.

The Github doc is available at: https://github.com/prebid/prebid.github.io

prebid commented 8 years ago

Closing the issue as there're no more action items left.

hariakhil31 commented 7 years ago

So is the $20 cap now removed?

hariakhil31 commented 7 years ago

you can customize your granularity and cap.

How to customize the cap? Is there an API method?

mkendall07 commented 7 years ago

@hariakhil31 Take a look at release notes for 0.14.0 (Custom cpm bucket sizing) the cap can now be set explicitly: https://github.com/prebid/Prebid.js/releases/tag/0.14.0