Main purpose of this seems to offer a way for undoing "previously blocked location access" by the user.

> If a prompt appears unexpectedly, users may block it reflexively or accidentally, unaware that this decision creates a permanent block that is difficult to reverse. This context gap—rather than the feature itself—is a primary driver of high denial rates.

> If a user previously blocked location access when browsing a site (perhaps by accident or lack of context), clicking the element triggers a specialized recovery flow. This helps them re-enable location at the moment when they actually want to use location, without the friction of navigating deep into the browser's site settings.

Google sees "high denial rates" when they try ask users for their geolocation. This is a problem for Google's customers, the advertisers. So they introduce this <geolocation> HTML tag so that dark patterns can be employed to trick users into permanently sharing location even though they have blocked location sharing before.

If the Google engineers who are working on this feature would actually give a damn about users who decided to block geolocation access, this feature would be designed as a "temporary access to geolocation for duration of browser session".

So basically it is all about more tracking and less data privacy.

It's overdue that skilled engineers provide better solutions than this crap, but of course it's much easier to be apolitical and become a millionaire working for a bunch of tech bros who visited Epstein's island.