Google Testing Large Thin Fonts For Search Result Snippets
Briefly

Google is experimenting with a new visual style for search result snippets, including larger and thinner fonts for titles, moving away from the traditional bold type.
Some users may find the thinner fonts a bit too fancy for mobile, but overall, it is an attempt to brighten the appearance of search results.
Unlike previous tests with font style, this new change aims to create a lighter look for the search results, which is being shared and discussed widely on platforms like X.
This isn't a surprising move for Google, as they frequently test various font styles to enhance user experience and keep their interface modern.
Read at Search Engine Roundtable
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