RDFa, short for Resource Description Framework in attributes, is a method for tagging the content of a web page to specify the meaning of the data it contains. In other words, adding RDFa tags clarifies the meaning of the information on a page, whether it’s a recipe, a personal biography, or any other type of content.

In the case of a recipe, using RDFa tags can explicitly indicate whether a number corresponds to preparation time, cooking time, or other relevant information. RDFa tags function like labels that help search engines better understand the content of a web page, which can lead to improved indexing or more accurate search results.

For a page describing a person, RDFa tags are invaluable for structuring their data: name, address, profession, company, etc. By using them, we enable search engines to categorize and display this information in a more organized and relevant way in their results.

A concrete example of how RDFa can be applied would be adding specific tags to a person’s description, as recommended by Google to optimize the visibility and understanding of the content by search engines.