How do I set up my billing information in Google Ads (Google AdWords)?

To add your billing information in Google Ads (previously known as Google AdWords), you should follow the steps as described below: 

1. Log in to your Google Ads account and click on the "Tool" icon at the top right of the page. 
2. Go to "Setup" and click on "Billing and payments". Here you can edit your configuration, including your billing address, payment details and the country you're operating from. Depending on your country, you'll see different options for payment methods and billing options. You can read more about them here.
3. After entering all the required information (country, tax information and billing information), you’ll have to read the Terms & Conditions for payments in Google Ads. When you’ve accepted them and submitted your information to Google, your setup will be completed.