Have you sent someone the link to your website only to not like the image that pops up? Using the steps below you can change this to any image you want.
How To Change The Preview Image.
To see the list of all your pages go to Advanced in header > Pages
Below every Page title you should see an option to Edit the page. Click on Edit link of the page you want to update.
In the Edit screen on Right sidebar look for Set Featured Image section ( marked as circled 1 below ) and choose an image there. Once done click on Update button ( marked as circled 2 below )
Give it a few minutes as social sharing sites will take some time to update the image on their end.
Updated on: 03 / 09 / 2020