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MGID adapter update docs #6685

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MGID adapter update docs
Jul 28, 2026
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26 changes: 26 additions & 0 deletions dev-docs/bidders/mgid.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
media_types: banner,native
tcfeu_supported: true
usp_supported: true
safeframes_ok: true
gvl_id: 358
floors_supported: true
ortb_blocking_supported: partial
Expand All @@ -20,6 +21,7 @@
- [Table of Contents](#table-of-contents)
- [Description](#description)
- [Bid params](#bid-params)
- [Additional Config](#additional-config)
- [Test Parameters](#test-parameters)
- [User Sync](#user-sync)

Expand All @@ -31,6 +33,10 @@

MGID header bidding adapter connects with MGID demand sources to fetch bids for display placements. Please reach out to your account manager or <prebid@mgid.com> for more information.

We also recommend enabling a **Bid Viewability** module. It provides **viewability signals** to buyers, which can improve **bid quality** and increase **monetization opportunities**. If you serve ads through **Google Ad Manager (GAM)**, enable the [bidViewability](/dev-docs/modules/bidViewable.html) module; for **ad-server-independent** setups, enable the [bidViewabilityIO](/dev-docs/modules/bidViewableIO.html) module.

In addition, enable the **gptPreAuction** module. It automatically populates the **GPID (Global Placement ID)** for each ad slot, along with the matching GAM ad unit name. MGID uses the GPID to key inventory per placement, which improves demand matching. See the [gptPreAuction module documentation](/dev-docs/modules/gpt-pre-auction.html) for setup details.

<a name="mgid-bid-params"></a>

### Bid params
Expand All @@ -42,6 +48,26 @@
| `bidFloor` | optional | Lowest value of expected bid price | `1.1` | `float` |
| `currency` | optional | Currency of request and response | `'GBP'` | `string` |


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### Additional Config

The MGID adapter supports **enhanced bid data** — additional signals collected and sent with bid requests that help MGID buyers **bid more accurately**, which can improve **bid quality** and increase **monetization opportunities**. It is disabled by default and works even better together with a **Bid Viewability** module (see the recommendation above).

To opt in, set `enhancedBidData` to `true` in `pbjs.bidderSettings`:

{: .table .table-bordered .table-striped }
| Name | Scope | Description | Example | Type |
|-------------------|----------|----------------------------------------------------------------------------|---------|-----------|
| `enhancedBidData` | optional | Collect and send enhanced bid data with bid requests. Defaults to `false`. | `true` | `boolean` |

```javascript
pbjs.bidderSettings = {
mgid: {
enhancedBidData: true
}
};
```

<a name="mgid-test-params"></a>

### Test Parameters
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