Hi zo,
Thanks for reaching out.
You can use the Advanced Ads plugin to connect your AdSense account within your WordPress backend to integrate AdSense Auto Ads code or place your AdSense ads manually without the need of copy and pasting code by hand.
If I purchase Products in All Access for single site and install it in multisite, will it work for all site?
The Advanced Ads plugin and its add-ons are also working on multisite installations. In this manual, you can read more about multisites.
Please read the linked manuals carefully and let me know if there are any further questions.
If you are interested in purchasing Advanced Ads, please reach out to our customer support.
Best regards,
Henning