---
title: Google Open Bidding integration (Site & App)
description: This article is reviewing Google Open Bidding integration for sites & Apps.
---

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# Google Open Bidding integration (Site & App)

## This article is reviewing Google Open Bidding integration for sites & Apps.

### Overview

Google Open Bidding integration connects your account to Google's unified auction, allowing you to bid on inventory from publishers using Google Ad Manager. This guide covers setting up for both the website and the mobile app inventory.

---

### Integration Architecture

#### **Inventory Structure Options:**

**Publisher-Specific Inventories:** Create separate inventory entries for each Google Open Bidding publisher you work with. This provides granular control and reporting per publisher.

**Default Inventory:** Create one "Default" inventory per account to catch all non-publisher-specific traffic from Google Open Bidding connections. This acts as a catch-all for any traffic that doesn't match specific publisher configurations.

#### **Single Endpoint Integration:**

**Important:** Only **one RTB endpoint** needs to be shared with your Google account manager, regardless of how many Google Open Bidding publishers you connect in your dashboard.

---

### Step-by-Step Setup

#### **Step 1: Create New Inventory**

1. Go to **Inventory Module** → **List** tab
2. Click **'+'** button to create new inventory

#### **Step 2: Configure General Settings**

1. **Source:** Select **Site** or **App**
2. **Fill required fields:** 
     - Inventory name (e.g., "Google OB - Publisher Name" or "Google OB - Default")
     - Associated business partner (optional)
3. **Integration Type:** Select **'Google Open Bidding'**

#### **Step 3: Configure Google Publisher Identifier**

Choose one of two options for the **'Inventory ID On Google Open Bidding'** field:

**Option 1: Publisher-Specific Inventory**

- Enter the **dfp\_ad\_unit\_code** OR **Publisher ID**
- This inventory will only receive traffic matching this specific identifier
- Create multiple inventories for different publishers

**Option 2: Default Inventory**

- Enter the word **'Default'** (exactly as shown)
- This inventory receives all traffic where the publisher ID is unknown
- **Limitation:** Only one Default inventory is allowed per account
- Acts as a catch-all for non-matched traffic

1. Click **'Create'**

#### **Step 4: Get RTB Endpoint**

1. Navigate to the **Integration** tab
2. **Copy RTB endpoint URL**
3. **Send the endpoint to your Google account manager** to complete the integration

**Quick Access:** Click integration type in the 'Type' column from the Inventory List for instant endpoint pop-up.

---

### How Traffic Matching Works

#### **Traffic Routing Priority**

Gamoshi uses hierarchical matching to route incoming Google Authorized Buyers requests to the correct inventory:

**Matching Order (First Match Wins):**

1. **DFP AD UNIT CODE** (highest priority - most granular) 
     - Found in impression extension
     - Matches specific ad unit placements
2. **Publisher ID** (medium priority) 
     - Found in the site or app object
     - Matches the entire publisher
3. **Billing ID** (lower priority) 
     - Found in impression extension
     - Matches billing entity
4. **Default Inventory** (fallback) 
     - Catches all unmatched traffic
     - Used when no specific match is found

---

### Troubleshooting

#### **No Traffic Received:**

**Check:**

- RTB endpoint shared with the Google account manager
- Google has completed integration on their end
- Campaigns are targeting Google OB inventory
- Bid floors aren't set too high

#### **Traffic Going to Wrong Inventory:**

**Review:**

- Publisher identifier format (dfp\_ad\_unit\_code vs. Publisher ID)
- Spelling and formatting of identifiers
- Check Analytics to see which inventory is receiving traffic
- Verify matching logic priority

#### **All Traffic in Default Inventory:**

**Possible causes:**

- Publisher-specific identifiers not configured correctly
- Google is not sending the expected identifier fields
- Identifier format mismatch
- Publisher-specific inventories have not been created yet

#### **Default Inventory Not Working:**

**Verify:**

- Exactly one Default inventory exists per account
- Field contains exactly the word "Default" (case-sensitive)
- No typos or extra spaces in the identifier field

---

### Integration Checklist

Before going live:

- ✅ Created publisher-specific inventories (if needed)
- ✅ Created Default inventory (catch-all)
- ✅ Copied RTB endpoint from Integration tab
- ✅ Sent endpoint to Google account manager
- ✅ Created campaigns targeting Google OB inventories
- ✅ Monitoring plan for Default inventory established

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