TLDR: There are various popular meta schemas available, such as Schema, microformats, or Open Graph. Meta schemas help embed information in documents, like articles and blog posts. Adding meta data, like publication date and author, can make content easily findable by computers. You can add meta data to the document head using HTML elements, like . Different schemas, like Dublin Core or Schema.org, offer various items you can add to your document. Services like Pocket, Instapaper, and Google use meta data differently, so it’s essential to choose the right schema. Open Graph is widely supported and recommended for better visibility in search results and on social media.
https://www.thisdaysportion.com/posts/dublin-core-what-is-it-good-for