In the Page Settings panel, there are a group of fields labeled "Facebook Tags." Note: This is available only in Shopify.
These fields populate the page's Open Graph meta tags, such as og: title and og: image. OpenGraph tags control the content that is displayed in feeds whenever your page is shared on Facebook.
The Type field assigns a category to the page, such as a product or article.
The Title, Image, and Description are what are displayed in people's Facebook feeds when the page's URL is shared.
The App ID is optional when sharing pages. It can be useful if you have a Facebook application affiliated with your business, but it is not required.
Why doesn't the info I see on Facebook match what I've added?
Facebook caches page information for at least 24 hours, so changes made to these fields will not be immediately reflected when pages are shared. The wait time can be expedited by using Facebook's Sharing Debugger tool: https://developers.facebook.com/tools/debug/sharing/
Paste your page URL and click the "Scrape Again" button to trigger Facebook to pull the page's latest data. Once this has been done, the correct data should appear in the tool and on all page shares moving forward.