# Banner Ad Unit Guide

### What is a Banner Ad?

A banner ad is one of the most common ad formats.\
It appears as a rectangular image that takes up part of the screen—typically at the top or bottom of an app or web page.

### How to Create a Banner Ad U

To set up a banner ad unit:

1. Go to the **Ad Products** tab and scroll down.\
   Click **“Create Ad Unit”** on the right side.
2. In the unit creation screen, follow these steps:
   * **To create app where the ad will be shown, first you need to select one platform. You can choose from three options: Google (Android), Apple (iOS), or Web.**

<figure><img src="https://1229048154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdbXqzAGZzRMkuFk2wG7Q%2Fuploads%2FSYza1Cl5KwrkWDJhjqVG%2FScreenshot%202025-08-01%20at%206.17.20%E2%80%AFPM.png?alt=media&#x26;token=eabfce62-4c9c-4869-a6c2-b1084236b74f" alt=""><figcaption></figcaption></figure>

* **Then, in the Select App section, search for the app where the ad will run.**&#x20;
* **Give your ad unit a clear name** (e.g., *Home Banner*, *Bottom Banner*, etc.).\
  This helps you and your advertisers easily recognize where the ad appears.
* **Choose “Banner”** as the ad format.

3. Scroll down and select a banner size from the options below:

* **375x80 dp**
* **320x50 dp**
* **320x100 dp**
* **300x250 dp**

You can also choose **Custom** to manually set your preferred width and height.

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### Enable Carousel Option (Optional)

Further down the page, you'll find the **Carousel Option**.\
Turning this **ON** allows your banner to display in a rotating format—like a slideshow.

### W**hat is a Carousel?**

A carousel is a feature that shows multiple banners in sequence, sallowing users to swipe or click through the content.\
You can find more detailed info about this option here.

&#x20;[https://help.adrop.io/publisher-guide/ad-unit/banner/carousel-banner](https://help.adrop.io/en/creating-an-ad-unit/banner-ad-unit-guide/carousel-banners)

Once all the settings are complete, click the **"Create Ad Unit"** button at the bottom right to finish creating your ad unit.