Show the right URL address and image on Facebook when you share your website.
When you share your website on Facebook it will show your website URL and share image.
Facebook can show your old URL and image and that is because Facebook has cached in your old website info.
By erasing your old website cache from Facebook, it will update and show the correct URL address and image of your website.
Click on this link below, type in your domain name (URL) and click on Debug