Group your content (Promotion, Ad Pod and Bumper) in your Ad break structure. Go to menu => PREPARE => Ad breaks.
TABLE OF CONTENTS
Encoding
Have you encoded your Ad breaks content on the platform so that it can be found in your content library?
If not, go to the following help page => Upload and manage your content.
Ad breaks on your FAST channel are content like any other. So go to your organization's CATALOG menu > Media encoding, and click on the Create new media to encode > Hosted video => 
Format
Once you've entered the information and metadata for your Ad breaks content, you need to define their categories so that they appear in your FAST channel's program inventory.
Go to the Metadata > Format menu and select one of the following formats:
- For Ad breaks: Ad Pod, Bumper and Promotion.
- For a Program: Bumper, Collection, Short, Direct, Feature, Mini-Series, Pastille, Podcast, Short Program, Series, or Unit.
Bumper and Promotion formats can be found in the 2 formations if required.
Ad breaks
Go to your FAST channel > PREPARE tab > Ad breaks
.
In this menu, you'll find the various Ad breaks created for your channel, with their names and durations. Click on the Create Ad break 
The structure of an Ad break is a set of Bumper Ad Pods and/or Promotions organized in the following specific order: Bumper + Ad Insert + Bumper.
Bumpers are very short programs that open and close your Ad break.
With a simple click, drop your Ad breaks from your program inventory (a.) to your new Ad break structure (b.).
Program inventory (a.)
This menu lets you sort your programs either alphabetically or by format filter. This is the same format you defined when encoding your content in the Metadata > Format tab. (Ad Pod, Bumper and Promotion) and these are the colors you've assigned in FAST => CONFIGURE > Channel parameters > Content type parameters.
Ad break structure (b.)
This menu contains the items you have selected from your Program Inventory.
It also includes the duration of the ad insertion (or ad break), the duration of your ad break (total duration of programs) and the number of programs.
Once you've created and named your program lists, you can move on to the next step, to integrate them into one or more time slots => Prepare your time slots.