An writer might display their title beneath an article or e book title together with other appropriate aspects like their occupation and social media profiles. I wouldn’t give much bodyweight to their advice. They say that "Structured data markup is most effortlessly represented in JSON-LD format", but I feel it’s https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html