You can use the AdWords Application Programming Interface (API) to:

  • integrate AdWords data with your inventory system
  • integrate AdWords data with multiple manager accounts
  • override AdWords functions you don’t need
  • integrate data about competitors into your account

The correct answer is:

  • integrate AdWords data with your inventory system

Explanation: The API is flexible and functional — you can use it to build an application that meets your needs. Using the API, you can:

  • Automatically generate keywords, ad text, landing pages, and custom reports.
  • Integrate AdWords data with your inventory system to manage campaigns based on stock.
  • Develop additional tools and applications to help you manage accounts.

Read more here: https://support.google.com/adwords/answer/2375503?hl=en