Some additional information, what you actually want to implement for every website is Structured Data, using the Schema.org vocabulary.

JSON-LD is one of the ways to do this. There's also RDFa and Microdata.

I used this article and can recommend it when I first learned about it: https://neilpatel.com/blog/get-started-using-schema/

You can try exploring what data to add with this tool: https://technicalseo.com/tools/schema-markup-generator/

The full list can be found on the schema.org site: https://schema.org/docs/schemas.html