With Prebid Mobile, you’ll need to setup line items to tell your ad server how much money the “bidder” demand is worth to you. This process is done with an ad server key-value pair: hb_pb, which stands for “header bidding price bucket”.
Example:
Prebid Mobile is going to call Prebid Server which calls your bidders for their price, then passes it into your ad server on the query-string. You want to target this bid price with a line item that earns you the same amount if it serves.
If you had 1-line item for every bid at a penny granularity of $0.01, $0.02, $0.03, …, 1.23, …, $4.56 you’d need 1,000 line items just to represent bids from $0-$10. We call this the “Exact” granularity option.
Creating 1,000 line items can be a hassle, so publishers typically use price buckets to represent price ranges that matter. For example, you could group bids into 10 cent increments, so bids of $1.06 or $1.02 would be rounded down into a single price bucket of $1.00.
The SDK itself doesn’t deal with granularity. Instead, these details are set up in Prebid Server and your ad server. The specific details about how to set up the price granularity will differ for each Prebid Mobile managed service company – check with your provider to get details for their system.
"low": $0.50 increments, capped at $5 CPM"med": $0.10 increments, capped at $20 CPM (the default)"high": $0.01 increments, capped at $20 CPM"auto": Applies a sliding scale to determine granularity as shown in the Auto Granularity table below."dense": Like "auto", but the bid price granularity uses smaller increments, especially at lower CPMs. For details, see the Dense Granularity table below."custom": If none of the above apply, your service provider should provide a way to establish arbitrary price buckets.Notes:
| CPM | Granularity | Example |
|---|---|---|
| CPM <= $5 | $0.05 increments | $1.87 floored to $1.85 |
| CPM <= $10 and > $5 | $0.10 increments | $5.09 floored to $5.00 |
| CPM <= $20 and > $10 | $0.50 increments | $14.26 floored to $14.00 |
| CPM > $20 | Caps the price bucket at $20 | $24.82 floored to $20.00 |
| CPM | Granularity | Example |
|---|---|---|
| CPM <= $3 | $0.01 increments | $1.87 floored to $1.87 |
| CPM <= $8 and >$3 | $0.05 increments | $5.09 floored to $5.05 |
| CPM <= $20 and >$8 | $0.50 increments | $14.26 floored to $14.00 |
| CPM > $20 | Caps the price bucket at $20 | $24.82 floored to $20.00 |
Please contact your Prebid Mobile host company for details about how to implement granularity.