diff --git a/dev-docs/bidders/gumgum.md b/dev-docs/bidders/gumgum.md
index b4be8091aa..34ed13433e 100644
--- a/dev-docs/bidders/gumgum.md
+++ b/dev-docs/bidders/gumgum.md
@@ -28,23 +28,23 @@ Client side and server side parameters differ slightly. For Server side (Prebid
 ### Server Side Bid Params
 
 {: .table .table-bordered .table-striped }
-| Name           | Scope                                      | Description           | Example                | Type      |
-|----------------|--------------------------------------------|-----------------------|------------------------|-----------|
-| `zone`         | pubId or zone required for all bid requests| Tracking ID           | `'ggumtest'`           | `string`  |
-| `pubId`        | pubId or zone required for all bid requests| Publisher ID          | `123`                  | `integer` |
-| `irisid`       | optional                                   | Iris.tv ID            | `'iris_6f9285823a4'`   | `string`  |
+| Name           | Scope                                                            | Description           | Example                | Type      |
+|----------------|------------------------------------------------------------------|-----------------------|------------------------|-----------|
+| `zone`         | required for all bid requests tracking a single domain or site   | Tracking ID           | `'ggumtest'`           | `string`  |
+| `pubId`        | required for all bid requests tracking multiple domains or sites | Publisher ID          | `123`                  | `integer` |
+| `irisid`       | optional                                                         | Iris.tv ID            | `'iris_6f9285823a4'`   | `string`  |
 
 ### Client Side Bid Params
 
 {: .table .table-bordered .table-striped }
-| Name           | Scope                                      | Description           | Example                | Type      |
-|----------------|--------------------------------------------|-----------------------|------------------------|-----------|
-| `zone`         | pubId or zone required for all bid requests| Tracking ID           | `'ggumtest'`           | `string`  |
-| `pubId`        | pubId or zone required for all bid requests| Publisher ID          | `123`                  | `integer` |
-| `slot`         | required for slot placement only           | Slot ID               | `9`                    | `integer` |
-| `iriscat`      | optional                                   | Iris.tv segments      | `'segment1,segment2'`  | `string`  |
-| `irisid`       | optional                                   | Iris.tv ID            | `'123'`                | `string`  |
-| `bidfloor`     | optional                                   | CPM bidfloor in USD   | `0.03`                 | `float`   |
+| Name           | Scope                                                            | Description           | Example                | Type      |
+|----------------|------------------------------------------------------------------|-----------------------|------------------------|-----------|
+| `zone`         | required for all bid requests tracking a single domain or site   | Tracking ID           | `'ggumtest'`           | `string`  |
+| `pubId`        | required for all bid requests tracking multiple domains or sites | Publisher ID          | `123`                  | `integer` |
+| `slot`         | required for slot placement only                                 | Slot ID               | `9`                    | `integer` |
+| `iriscat`      | optional                                                         | Iris.tv segments      | `'segment1,segment2'`  | `string`  |
+| `irisid`       | optional                                                         | Iris.tv ID            | `'123'`                | `string`  |
+| `bidfloor`     | optional                                                         | CPM bidfloor in USD   | `0.03`                 | `float`   |
 
 ### Legacy Client Side Bid Params