themes/kube/layouts/partials/site-verification.html

{{ if .Site.Params.seo.webmaster_verifications.google }}
  <meta name="google-site-verification" content="{{ .Site.Params.seo.webmaster_verifications.google }}" />
{{ end }}
{{ if .Site.Params.seo.webmaster_verifications.bing }}
  <meta name="msvalidate.01" content="{{ .Site.Params.seo.webmaster_verifications.bing }}">
{{ end }}
{{ if .Site.Params.seo.webmaster_verifications.alexa }}
  <meta name="alexaVerifyID" content="{{ .Site.Params.seo.webmaster_verifications.alexa }}">
{{ end }}
{{ if .Site.Params.seo.webmaster_verifications.yandex }}
  <meta name="yandex-verification" content="{{ .Site.Params.seo.webmaster_verifications.yandex }}">
{{ end }}