Clarify og:image behavior in SEO documentation

optimize/seo.mdx

@@ -1,9 +1,9 @@
 ---
 title: "SEO"
 description: "SEO best practices and meta tag configuration for better search visibility"
 ---
 
 Mintlify automatically handles many SEO best practices, including:
 
 - Meta tag generation
 - Sitemap and `robots.txt` file generation
@@ -36,13 +36,17 @@
 ```
 
 <Note>
   Meta tags with colons must be wrapped in quotes.
 </Note>
 
 ## Common meta tags reference
 Below is a comprehensive list of meta tags you can add to your `docs.json`. These meta tags help improve your site's SEO, social sharing, and browser compatibility.
 
+<Note>
+  The `og:image` adds a background image that Mintlify automatically overlays with your logo, page title, and description when generating social media previews.
+</Note>
+
 You can preview how your meta tags will appear on different platforms using [metatags.io](https://metatags.io/).
 
 ```json expandable
 "seo": {
@@ -152,11 +156,11 @@
 
 ### Custom sitemaps and robots.txt files
 
 To add a custom `sitemap.xml` or `robots.txt` file, create a `sitemap.xml` or `robots.txt` file at the root of your project. Adding a custom file will override the automatically generated file of the same name. If you delete a custom file, the default file will be used again.
 
 ## Disabling indexing
 
 If you want to stop a page from being indexed by search engines, you can include the following in the [frontmatter](pages) of your page:
 
 ```
 ---
@@ -178,14 +182,14 @@
 
 <AccordionGroup>
 <Accordion title="Write descriptive titles and descriptions">
 - Use clear, descriptive page titles (50-60 characters)
 - Write compelling descriptions (150-160 characters) 
 - Include relevant keywords
 - Make each page title and description unique
 </Accordion>
 
 <Accordion title="Optimize your content structure">
 - Use proper heading hierarchy (H1 → H2 → H3)
 - Write for humans first, search engines second
 - Include relevant keywords in headings and content
 - Keep URLs short, descriptive, and organized hierarchically
@@ -201,7 +205,7 @@
 
 <Accordion title="Image SEO">
 - Use descriptive file names for images
 - Always include alt text for accessibility and SEO
 - Optimize image file sizes for faster loading
 - Use relevant images that support your content
 </Accordion>