Choose the audience you would like to export. Click on the gear icon next to the Segment or List and click "Actions" in the drop-down menu.
To export to Twitter, click the Twitter icon in the Actions modal.
Next, name your Export. Click "Configure Export."
The next screen will prepopulate the necessary information to import data to Twitter for advertising campaigns. You can select any additional data you would like to add in the export. Click "Export" to complete the export. The export CSV will include a Twitter ID. You can use the Twitter ID to import into Twitter to build an audience or an ad campaign.