How to implement Google Discover

I just saw that for articles to appear in Google Discover it is necessary to enable the max-image-preview:large setting.

How can this be done? Which template should be edited?

Thanks.

Get on Discover | Google Search Central | Documentation | Google for Developers ​

Google's Discover feed shows content related to user interests. This documentation will teach you how to get on Discover and monitor traffic.

developers.google.com

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