add links between footer config section and seo metadata page

Author: devalog

fern/products/docs/pages/customization/what-is-docs-yml.mdx

@@ -268,7 +268,11 @@ navbar-links:
 
 ## Footer links configuration
 
-Add social media and community links to your documentation footer to improve discoverability and engagement.
+Add clickable social media and community links to your documentation site footer to improve discoverability and engagement.
+
+<Note>
+  Footer links provide visual navigation to your social channels. To configure SEO metadata and social media tags at the page or site level, see [metadata configuration](/learn/docs/seo/setting-seo-metadata).
+</Note>
 
 ```yaml docs.yml
 footer-links:
@@ -299,7 +303,7 @@ footer-links:
 </ParamField>
 
 <ParamField path="footer-links.twitter" type="string" required={false} toc={true}>
-  URL to your Twitter profile. Use `x` for the new X branding.
+  URL to your Twitter profile. Use `footer-links.x` for the new X branding.
 </ParamField>
 
 <ParamField path="footer-links.linkedin" type="string" required={false} toc={true}>

fern/products/docs/pages/seo/metadata.mdx

@@ -7,6 +7,10 @@ Optimize your documentation's search visibility and social media presence by con
 
 When configuring SEO metadata, ensure your titles and descriptions are unique, descriptive, and relevant to the page content. Keep descriptions between 150-160 characters for optimal display in search results.
 
+<Note>
+    The metadata configurations on this page are for SEO and social tags that aren't visible to users. For visible footer links, see [footer links configuration](/learn/docs/configuration/what-is-docs-yml#footer-links-configuration).
+</Note>
+
 ## Page metadata
 
 Set SEO properties in each page's [frontmatter](/docs/configuration/page-level-settings) to control how individual pages appear in search results and social media shares. Page-level metadata takes precedence over site-wide settings.