Contact MyAmazonGuy at www.myamazonguy.com/contact – Advertising Setups for $500.
Portfolios are brand new, not every account has them yet. Check your account in seller central by going to advertising, campaigns, and on the left hand side you can see whether your account is enabled.
These will primarily help you divide your campaigns into sections to know results, cap budgets, and other reporting tools and control at a higher level than campaigns. Previously you could only control keyword bids, campaign budgets. This helps Amazon catch up to many of the Google tools out there.
Amazon help file on portfolios: https://sellercentral.amazon.com/gp/help/help-page.html?itemID=200663330
Previous advertising videos:
-Advertising framework, segmentation by manual/auto/brand/competitor: https://www.youtube.com/watch?v=9U4hdo__SRE
-Beta advertising automatic campaign targeting: https://www.youtube.com/watch?v=S2ESzzbjxG8
-Beta product targeting on sponsored ads https://www.youtube.com/watch?v=JOXomqC-jgc&t=5s