Ads Editor checks the audiences that already exist in the account before creating each one. If an audience with exactly the same name already exists, it isn't created again: the item shows as completed in the list, but the system reuses the existing audience and it isn't counted in the final total of created audiences. This lets you run bulk creation several times without creating duplicates, for example to fill in periods that were missing. Note: the comparison uses the exact name, so if you renamed an audience in Meta Ads Manager, Ads Editor will create a new one with the default name.