Autopilot's native Google AdWords (now "Google Ads") integration makes it easy to add and remove contacts from AdWords Customer Match audiences.
You can connect to Google AdWords in Settings:
Click "Connect to Google AdWords". You will then be asked for your Customer ID, which is displayed in the top left of AdWords' interface:
Note: if you're using the old AdWords experience, it's found in the top right.
Once you have entered your Customer ID, follow the login steps on Google.
You can now use the following shapes in your Journeys: