How it works
Open Graph tags supply fields that sharing services can use to build a link preview. The title, description, image, URL and content type describe a particular page. They belong in the page head and should agree with the visible subject and language.
A realistic example
Sharing a Spanish term page should not produce an English title and an unrelated homepage image. A suitable preview can use the actual term title and a relevant diagram, provided the image is reachable by the sharing service.
What to check
Inspect og:title, og:description, og:image and og:url in the final response. Check absolute URLs, image dimensions, status and language. Test a representative share where possible; some services cache earlier values and do not immediately refresh after a release.
Limits and next steps
Tags do not control every platform’s layout or guarantee a preview. Do not make the shared description more promotional or certain than the page. Keep one generator for these fields so a theme and plugin do not emit conflicting values.
Additional examples and checks
Open Graph is a vocabulary for describing an object when its URL is shared. Its page-level representation is a collection of metadata tags. Different object types can require different properties; an ordinary informational page should not pretend to be a product, video or article with facts it does not contain.
A shared glossary term can identify a webpage with a term-specific title. A genuine article may describe article-related context. Choosing a type because it sounds more impressive, without the supporting content, makes the metadata misleading.