---
title: "Uploading Creatives"
slug: "uploading-creatives"
description: "Learn how to upload and edit creatives in your Creative Library, including media types, UTM codes, and ad set assignments for effective campaigns."
tags: ["Creatives", "Ad Set", "UTM"]
updated: 2025-12-16T17:51:13Z
published: 2025-12-16T17:51:13Z
canonical: "help.quantcast.com/uploading-creatives"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.quantcast.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Uploading Creatives

There are two ways to upload and edit creatives:

1. When [creating/editing an ad set](/v1/docs/new-ad-set-creation)
2. At any time in your Creative Library

## **Upload Creatives**

### **From an Ad Set**

1. Create/edit an ad set and locate the Creative section towards the bottom of the ad set, then click **Attach Creatives**.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip0(16).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

1. In the Attach Creatives screen, click **Upload Creatives**.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip1(11).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

  

1. Select the appropriate media type for your creative.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip2(20).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

1. Enter the required information for the creative, including the **URL** and the creative **Dimensions**.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/creative update.PNG?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

> **Note:** If desired, you can use UTM codes at the end of the URL to help you identify your traffic data.

1. When done, click **Save**.

> **Note**: There is a 255-character limit on creative names.

#### **Ad Set Creative Assignments**

After a creative has been attached to a Full Performance (prospecting and retargeting), Prospecting (Lookalike), or Retargeting ad set, you can select an assignment for how the creative will be used.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip3(8).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

Click the **Assignment** drop-down menu and select one of the following options:

- **All:** Default setting. The creative will be used for lookalike events AND retargeting events
- **Prospecting Only:** The creative will be used only for lookalike events if the ad set has any
- **Retargeting Only:** The creative will be used only for retargeting events if the ad set has any

> **NOTE:** You can select **Prospecting Only** if lookalike events are selected for the ad set. Likewise, you can select **Retargeting Only** if retargeting events are selected for the ad set.

### **From the Creative Library**

> **Note**: There is a 255-character limit on creative names.

1. Click the **Global Navigation**, then select **Creatives** under Assets.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip4(13).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)
2. In the Creatives Library, click **Upload Creatives** at the top right.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip5(4).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)
3. Select the appropriate media type for your creative.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/mceclip2(20).png?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

1. Enter the required information for the creative, including the **URL** and the creative **Dimensions**.

![](https://cdn.us.document360.io/9a180fa0-df3b-4942-a5f6-b3905cf917d9/Images/Documentation/creative update.PNG?sv=2026-02-06&spr=https&st=2026-11-08T07%3A35%3A31Z&se=2026-11-08T08%3A35%3A31Z&sr=c&sp=r&sig=iwaNTtG2tPwsGz0x6J6WxOQ8ruAbco%2Bt8QzQifxqfk0%3D)

> **Note:** If desired, you can use UTM codes at the end of the URL to help you identify your traffic data.

1. When done, click **Save**.