> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://knowledge.flightcast.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to use the FlightCast Inventory Planner, Forecasting, and check VAST Fill Rates

## How to Read and Use the Inventory Planner in FlightCast

 

**1. Open the Inventory Planner to forecast available ad inventory** [0:00](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=0)

![generated-image-at-00:00:00](https://loom.com/i/6a317e1dcd7d4d73b33960caefb5af74?workflows_screenshot=true)

* The Inventory Planner shows: 
* How many ad impressions you’re likely to get
* How many impressions are already booked or sold
* How your programmatic fill rate is performing
* Use it to understand how much inventory you still have available to sell.

 

**2. Review the overall forecast for the next 7 days** [0:18](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=18)

![generated-image-at-00:00:18](https://loom.com/i/beb4a812d33e4c5792a4acf4f4d36452?workflows_screenshot=true)

* The example view is set to the next seven days.
* In the sample forecast: 
* About **2.5 million** total ad impressions are projected
* About **200,000** are already committed to current sponsors/campaigns
* About **2.3 million** impressions remain available to sell
* This works out to roughly a **7.6% sell-through**.

 

**3. Drill into inventory by country** [0:42](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=42)

![generated-image-at-00:00:42](https://loom.com/i/bea62ede41ef452c94e4de3be0a5ef7a?workflows_screenshot=true)

* Scroll down to see the forecast broken out by country.
* For example, in the **United States**: 
* About **2.48 million** impressions are projected
* About **147,000** are expected to be delivered
* About **42,000** are already booked
* The remaining inventory is what you should consider selling to additional sponsors
* This helps identify where your biggest inventory opportunities are.

 

**4. Check programmatic fill rate to see how often ads are actually served** [1:08](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=68)

![generated-image-at-00:01:08](https://loom.com/i/a46f73a4d224435a852ae3916f5cb2c7?workflows_screenshot=true)

* After sponsor and campaign inventory, review the **programmatic ads** section.
* Fill rate shows how often an available ad opportunity actually got filled with a paid ad.
* In the example, the U.S. programmatic fill rate is **58%**.
* That means ads were served in the U.S. about 58% of the times an opportunity existed.

 

**5. Use the fill-rate data to spot under-monetized regions** [1:51](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=111)

![generated-image-at-00:01:51](https://loom.com/i/e877f6de5a0749b5b2e736eae5682b9f?workflows_screenshot=true)

* If you want to know whether you’re getting as many ads as possible, this screen helps identify weak spots.
* Look for countries with: 
* High audience volume
* Low fill rates
* Those are the places where you may be leaving money on the table.

 

**6. Add custom VAST tags to improve fill in specific markets** [2:00](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=120)

![generated-image-at-00:02:00](https://loom.com/i/8b776a20eabb4e0cbf8802a2e817c580?workflows_screenshot=true)

* FlightCast supports custom **VAST tags** from advertisers.
* If a country has strong audience volume but weak FlightCast ad fill, you can: 
* Find an advertiser in that market
* Get their VAST tag
* Plug it into FlightCast
* This can increase fill rate and improve revenue in that region.

 

**7. Ask FlightCast to help improve low-fill countries** [2:27](https://loom.com/share/f855844e559745f582815d799d6ebc89?t=147)

![generated-image-at-00:02:27](https://loom.com/i/3ac4c05287a64fd59ea074ba7f03890a?workflows_screenshot=true)

* If you notice countries with low fill rates, let the FlightCast team know.
* They can try to build more advertiser relationships in those regions.
* This is the best way to understand and improve your inventory performance.