What is Experimental Features -> Push API for ?

What is Settings app -> Safari -> Advanced -> Experimental Features -> Push API for?

I thought it would be possible to receive WebPush on Safari, but it didn't work.

Also, I thought it was a setting related to WebPush, which operates when a PWA-compatible site is added to the home screen, but I was able to receive it regardless of this setting.

Thank you,

What is Experimental Features -> Push API for ?
 
 
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