*`logo` - URL to a site-wide logo (e.g., `/assets/your-company-logo.png`) - If you would like the "publisher" property to be present, you must add this field to your site's configuration, during the validation of the structured data by Google web master tools, if the `logo` field is not validated, you will find errors inherent to the publisher in the [structured datas test](https://search.google.com/structured-data/testing-tool/u/0/)
*`social` - For [specifying social profiles](https://developers.google.com/structured-data/customize/social-profiles). The following properties are available:
*`name` - If the user or organization name differs from the site's name
*`links` - An array of links to social media profiles.
*`date_modified` - Manually specify the `dateModified` field in the JSON-LD output to override Jekyll's own `dateModified`. This field will take **first priority** for the `dateModified` JSON-LD output. This is useful when the file timestamp does not match the true time that the content was modified. A user may also install [Last Modified At](https://github.com/gjtorikian/jekyll-last-modified-at) which will offer an alternative way of providing for the `dateModified` field.
```yml
social:
name: Ben Balter
links:
- https://twitter.com/BenBalter
- https://www.facebook.com/ben.balter
- https://www.linkedin.com/in/BenBalter
- https://plus.google.com/+BenBalter
- https://github.com/benbalter
- https://keybase.io/benbalter
```
*`google_site_verification` for verifying ownership via Google webmaster tools
* Alternatively, verify ownership with several services at once using the following format:
```yml
webmaster_verifications:
google: 1234
bing: 1234
alexa: 1234
yandex: 1234
```
*`lang` - The locale these tags are marked up in. Of the format `language_TERRITORY`. Default is `en_US`.
The SEO tag will respect the following YAML front matter if included in a post, page, or document:
*`title` - The title of the post, page, or document
*`description` - A short description of the page's content
*`image` - URL to an image associated with the post, page, or document (e.g., `/assets/page-pic.jpg`)
*`author` - Page-, post-, or document-specific author information (see below)
*`lang` - Page-, post-, or document-specific language information