Also called Auto Campaigns, these are simple campaigns that are mostly controlled by Amazon.
Automatic campaigns are campaigns that contain no keywords. Their main search term matching functionality is controlled by Amazon. When using an Auto Campaign, Amazon will show your ad for search terms it has determined are relevant to you based upon several factors, including your front end and back end listing.
Search term data from automatic campaigns can be a valuable source of research information for building out manual campaigns.
Auto campaigns contain certain targeting types or groups, which control how specific the search terms are that Amazon matches you with.
For more information on creating and optimizing Auto campaigns, please check out the Blueprint Series.