I have not shared it with many people. But one of my most wanted feature is to completely share by photos with my partner. None of the services I tried (Plex, Synology Photos) had it. In Immich, it’s just a flip of a button.

You get a link and you can set read or write permissions on it.

Whoever gets that link can browse it in a web browser.

I've used this to share albums of photos with gatherings of folks; it works very well. It does assume you have your Immich installation publicly available, however. (Not open to the public, but on a publicly accessible web server)

If you want to share with family, you can permanently add them as users to your Immich instance. Otherwise, you can create a link that they can use.