> ## 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.

# What are Ad Units?

> Ad Units are the foundational concept for monetizing apps and websites. Understanding this concept will greatly help you develop strategies to increase revenue.

## What is an Ad Unit?

An **Ad Unit** is simply a **frame (space) where ads can be displayed**.

It refers to an area where code is embedded in a specific location of an app or website to display ads, and Ad Control fills this Ad Unit with the most appropriate creative in real-time.

Each Ad Unit has a unique **Ad Unit ID**. Through this ID, the system identifies where the ad request originated and delivers ads that match the size and format.

***

## Types of Ad Units

These are the main Ad Units available in Ad Control.

| Formats          | Description                                                     | Features                                                   |
| ---------------- | --------------------------------------------------------------- | ---------------------------------------------------------- |
| **Banner**       | Fixed display in banner form at the top or bottom of the screen | Continuous exposure without interfering with content usage |
| **Interstitial** | Large ad covering the entire screen                             | High visibility leads to higher CTR and pricing            |
| **Rewarded**     | Provides in-app rewards upon completion of viewing              | Less resistance as users voluntarily choose to watch       |
| **Native**       | Ad that naturally blends with content design                    | Minimizes resistance with less apparent advertising feel   |
| **Popup**        | Displayed as a popup on part of the screen                      | Bottom/center positioning with various closing options     |
| **Splash**       | Displayed when launching the app                                | Achieves high visibility at app start                      |

***

## Why is Ad Unit Management Important?

Simply adding more ads doesn't increase revenue. The key is **which Ad Units you place and where**.

<Note title="Monetization Tips">
  * **Placement Strategy**: Placing appropriate Ad Units where users' attention lingers increases CTR.
  * **Diversity**: Rather than relying only on banners, mixing in Rewarded ads or Interstitial ads can maximize revenue (eCPM).
  * **Optimization**: Analyze performance by Ad Unit on the Dashboard, and try changing the position or format of Ad Units with low revenue.
</Note>

***

## Relationship Between Ad Units and Ad Products

| Category        | Description                                                                                |
| --------------- | ------------------------------------------------------------------------------------------ |
| **Ad Units**    | Individual areas where ads are actually displayed (e.g., home top banner, mid-feed native) |
| **Ad Products** | Units that bundle Ad Units for sale (e.g., "Premium Package" = home banner + feed native)  |

Advertisers purchase Ad Products, and ads are displayed on the Ad Units included in those products.

***

## Table of Contents

1. ⚡ [Quickstart: Creating Your First Ad Unit](/ad-unit/quickstart)
2. [Ad Unit Formats](/ad-unit/formats)
3. [Video Ad Units](/ad-unit/video)
4. [Supporting Dark Mode](/ad-unit/dark-mode)
5. [Creating Ad Units](/ad-unit/create)
6. [Managing Ad Units](/ad-unit/manage)
7. [Maximize Revenue with Backfill Ads](/ad-unit/backfill)