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

# Quickstart: Creating Your First Ad Unit

> Time required: About 5 minutes

## Before You Start

* App name
* Package name (Android) / Bundle ID (iOS) / Domain (Web)

## Step-by-Step Guide

<video autoPlay muted loop playsInline src="https://mintcdn.com/openrhapsody/nmJyqhGEamtoPhFG/videos/ad-unit-create.mp4?fit=max&auto=format&n=nmJyqhGEamtoPhFG&q=85&s=1ac1fdcb8dc600b5ec464c32bab8c505" data-path="videos/ad-unit-create.mp4" />

<Steps>
  <Step title="Register App">
    To create an Ad Unit, you must first register an app.

    1. Access Console → Select **Ad Units** menu
    2. Click **Add App**
    3. Enter app information
       * **App Name**: Search store or enter manually
       * **Platform**: Android / iOS / Web
       * **Package Name** (Android) / **Bundle ID** (iOS) / **Domain** (Web)
    4. **Save** → App ID is issued

    <Note>
      Apps registered on Google Play or App Store can be quickly added through search.
    </Note>
  </Step>

  <Step title="Create Ad Unit">
    1. Select registered app
    2. Click **Add Ad Unit**
    3. Enter Ad Unit information
       * **Formats**: Choose from Banner, Interstitial, Rewarded, Native, Popup, Splash
       * **Size**: Available sizes vary by format
       * **Ad Unit Name**: Name for management (e.g., Home\_Top\_Banner)
    4. **Save** → Ad Unit ID is issued

    <Note>
      You can also create Ad Units from the [Create Ad Products](/ad-product/quickstart) screen.
    </Note>
  </Step>
</Steps>

## Completion

Once created, you'll receive an App ID and Ad Unit ID.

| Item           | Where to Find  | Purpose                     |
| -------------- | -------------- | --------------------------- |
| **App ID**     | Settings > App | Used for SDK initialization |
| **Ad Unit ID** | Ad Unit list   | Used for ad requests        |

Provide the issued IDs to your developer. The developer will integrate the SDK to display ads on that Ad Unit.

## Next Steps

**Learn More**

<Card title="Ad Unit Formats" icon="table-cells-large" href="/ad-unit/formats">
  Check the sizes and options for each format.
</Card>

**Move to Next Quickstart**

<Card title="Quickstart: Creating Your First Ad Product" icon="bolt" href="/ad-product/quickstart">
  Compose Ad Units into products.
</Card>

***

## FAQ

<AccordionGroup>
  <Accordion title="What's the difference between Ad Units and Ad Products?">
    Ad Units are individual areas where ads are actually displayed, while Ad Products are units that bundle Ad Units for sale. Advertisers purchase Ad Products, and ads are displayed on the Ad Units included in those products.
  </Accordion>

  <Accordion title="What size should I create Ad Units for Backfill ads?">
    To increase the Fill Rate for Backfill ads, we recommend standard sizes widely used by global ad networks.

    | Size        | Description                            |
    | ----------- | -------------------------------------- |
    | **320x50**  | Basic mobile banner, highest Fill Rate |
    | **320x100** | Large banner                           |
    | **300x250** | Medium rectangle, high eCPM            |
  </Accordion>

  <Accordion title="Can I modify Ad Units after creation?">
    We recommend creating new Ad Units when possible. The Ad Unit may already be in use by deployed apps, so modifications could cause unexpected issues.
  </Accordion>
</AccordionGroup>