I've previously mentioned my love of desktop browser notifications 🙃.
As it turns out, Google just added UX data around push notification prompt interactions across more than 30,000 websites to their Chrome User Experience Report.
Rick Viscomi has unpacked some of the key insights from the data which likely won't surprise you. It's certainly worth a read though.
There is a huge difference in engagement between phones and desktops. Phone users are very unlikely to ignore the prompt, whereas desktop users ignore the prompt about half the time on average. The simplest explanation is screen size; it's a lot harder to ignore a prompt when it's taking up a larger portion of your screen.