Simple way to set up Site Kit by Google is here
How to set up Site Kit:
- Go to your WordPress dashboard, and click Add New under the “Plugins” menu.
- Search for “Site Kit by Google”, find the plugin and click Install Now.
- After you’ve installed the plugin, click Activate.
- Click Start Setup and then follow the steps to set up Site Kit.
- After you’ve completed the setup, click Connect Service under “AdSense”. You can find this on the Site Kit dashboard or “Settings” tab.
- Follow the instructions in the plugin. I suggest that you allow Site Kit to place the AdSense code, which will place the AdSense code for non-AMP and AMP versions of your wordpress site.
Hat tip: To ensure the Ad-sense ads are served correctly and quickly, just go to your Google Adsense account and enable auto ads. Once you enable it the Site Kit will start showing Analytics of the ads in “Adsense” tab within the Site Kit word-press plugin.
I’ve personally found that my Adsense revenue went up by 22% and RPM reached $7 once I enabled auto ads in Adsense and started serving ads through Site Kit plugin rather than manually inserting ad code into HTML pages for wordpress theme. That’s the main benefit of using Site Kit plugin. Also its a best alternative to other adsense plugins I’ve used for inserting ads like “ad inserter” and “advance ads” and “ads by wp quads”