Can’t promote my products on Amazon

Hi - I’m trying to create a Sponsored Promotion on Amazon but everytime it says it’s ‘ineligible’ due to not winning Buy Box?! I’m totally confused by ‘Buy Box’. I’m launching a brand new product that I manufacture myself so there are no other sellers of this product. What can I do to get my products seen as they are currently about page 1,000!!!
Many thanks

New sellers do not qualify for the Buy Box until 90 days - even if they are the only seller - so it is a waste of your time and money paying for ads until you qualify.

Search seller help for Buy Box to learn more