Click on your site to edit it
Click on the 'Settings' tab at the top
Scroll down to the bottom of the modal overlay
Look for the area that shows the SEO title, description and image fields
You can add your info, upload your own image or choose a stock photo to represent your site
Click the 'Save Changes' button and then the 'Done' button
Make sure to publish your site in order for the changes to take effect
How do I change the SEO META image, title and description for my site?
If you share your site URL online or on social media this is how to make sure the correct information shows up