You can now easily add Google Ads to your theme.
Step 1 — Create AdSense Account
Start a Google AdSense account and enter your site url for approval.
Step 2 — Create Display Ad
In AdSense, create a display ad.

Name it, keep it square and responsive.

Copy the code snippet.

Step 3 — Paste it in the Customizer
In the WordPress Theme Customizer -> Google Ads, there’s a spot to paste your code snippet.
Ads will appear on your site.