'What are Cloud Anchors?

I was exploring Google IO 2022 webpage, having been introduced to it just this year. Something that was interesting to me was ARCore Cloud Anchors - https://codelabs.developers.google.com/codelabs/arcore-cloud-anchors

I wanted to know more about how cloud anchors work but could not find much on the internet that explains this concept intuitively. Kindly help me understand what are these and how do they work.

PS: If this is the wrong stack exchange site to post this query, kindly let me know where can I post this query instead?



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