Progressive Web App. It’s a way for web UIs to be used like native apps.

This is why Lemmy’s web UI works well as a PWA lol.

I don’t think that’s possible to do using activity pub, but if you have a matrix account you can add it in your settings. When viewing the profile of someone who has a matrix account set on the web ui, there will be a button that says “send encrypted message”. You should see it if you look at my profile page, for example.

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