Luma makes sure that your events and home page look great on social media. We generate a beautiful preview image or use your custom image.
But if you update your image, the social networks might still use the old version. Here is how you can tell the social networks to use your new image.
Follow the link for each network you'd like to update:
Facebook: https://developers.facebook.com/tools/debug/
LinkedIn: https://www.linkedin.com/post-inspector/