The Google Ads Application Programming Interface (API) allows developers to use applications that:

• are accessible only through Adwords Editor.
• can appear throughout the Google Search Network.
• can be uploaded into the Ad gallery.
• interact directly with the Google Ads server.

The correct answer is:

• interact directly with the Google Ads server.

Explanation: The Google Ads API lets developers build applications that interact directly with the Google Ads server.

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