--- title: "book:tag · Meta Tag · zhead" canonical_url: "https://zhead.dev/meta/book-tag" last_updated: "2026-08-10T16:29:03.046Z" meta: description: "Adds a tag word or phrase associated with a book. Repeat the property to provide more than one tag." "og:description": "Adds a tag word or phrase associated with a book. Repeat the property to provide more than one tag." "og:title": "book:tag · Meta Tag · zhead" --- Open Graph metadata # book:tag Adds a tag word or phrase associated with a book. Repeat the property to provide more than one tag. ## Code examples Good example ``` ``` A clear genre for the book. Good example ``` ``` A specific theme covered by the book. Avoid this example ``` ``` A subjective opinion that does not describe the book. Avoid this example ``` ``` A call to action, not a book tag. ## Recommendations - 01 Describe the Book Use subjects, themes, or genres that genuinely apply to the book. - 02 Repeat the Property Write one book:tag element for each value. A comma-separated list is still one tag string. ## Related documentation - [Open Graph protocol](https://ogp.me/) ## Related meta tags ### [book:author](https://zhead.dev/meta/book-author) property Links a book to an author profile. The value is a URL, and you can repeat the property for multiple authors. ``` ``` Points to the author’s profile page. ### [book:isbn](https://zhead.dev/meta/book-isbn) property Provides the book’s International Standard Book Number as a string. ``` ``` A valid ISBN-13 written without display separators. ### [book:release\_date](https://zhead.dev/meta/book-release-date) property Records when a book was released. Open Graph defines the value as an ISO 8601 datetime. ``` ``` An ISO 8601 calendar date when no exact release time is needed. ### [book:tag](https://zhead.dev/meta/book-tag) property Adds a tag word or phrase associated with a book. Repeat the property to provide more than one tag. ``` ``` A clear genre for the book.