Can someone tell me how to make my Joomla site show a thumbnail when I post a link to facebook please..

Hi,

We apologize for the inconvenience.

To display a thumbnail image when sharing your Joomla website links on Facebook, you need to configure Open Graph meta tags. These tags help Facebook identify the title, description, and image to display in the link preview.

If you are using SP Page Builder, you can configure the Open Graph metadata for individual pages by editing the page and navigating to the SEO section in Page Settings. There, you can specify the Open Graph title, image, and description.

For more details, please refer to our documentation:
https://www.joomshaper.com/documentation/sp-page-builder/options-of-sp-page-builder#span-style-font-weight-400-seo-span:~:text=on%20those%20pages.-,Open%20Graph,-Open%20Graph%20meta

Additionally, the global Open Graph settings in SP Page Builder allow you to configure the Facebook App ID and enable or disable the Open Graph functionality. Please note that these global settings do not provide individual thumbnail image configuration.

Documentation: https://www.joomshaper.com/documentation/sp-page-builder/first-look/settings#:~:text=of%20your%20template.-,Open%20Graph,-Disable%3A%20The%20default

After configuring the metadata, you can use the Facebook Sharing Debugger to check your page's link preview and refresh Facebook's cached data if necessary.

We hope this helps!