Create a segment

A forecast segment is a slice of targeted inventory that you use to create forecast adjustments or to revisit the forecast for important parts of your inventory.

Segments can target any component in the targeting selector. Once you create a segment, the targeting cannot be changed.

You can create segments from any of the three tabs on the "Traffic forecast" page.

Create a segment through the Forecast tab

1. Sign in to Google Ad Manager.
2. Click Inventory Traffic forecast.
3. Click the Forecasttab.
4. Click Targetingand update the targeting of your forecast.
5. Above the forecast graph, click Save as segment.
   If there’s already a segment with the same targeting, the Save as segmentbutton is deactivated. On the right side of the screen, you’ll see the message, "Segment found that matches targeting." Click the link to see the existing segment’s details.
6. Name the segment and click Save.
   The details for that segment appear. Click All segmentsat the top to go to the "Segments" tab and be able to access the other tabs.

Create a segment through the Segments or Adjustments tab

1. Sign in to Google Ad Manager.
2. Click Inventory Traffic forecast.
3. Click the Segmentsor Adjustmentstab.
4. Above the table, click New traffic forecast segment.
5. Name your segment and update the targeting.
6. There are two options for saving:
   • Click Saveand return to the "Segments" tab .
   • Click Add forecast adjustmentand follow the instructions to  add a forecast adjustment.

See segment details

Click the new Segmentstab near the top of the "Traffic forecast" page. You’ll see these columns: