When your business shares content on Facebook, you should have choice about how that content is shown. That's why Facebook has launched a feature in Business Manager that allows businesses to claim and verify domains.
Last summer Facebook deleted the function to change the image, title and description of link posts in the battle against fake news. By verifying your domain in the Business Manager you will have the ability to overwrite link metadata when creating link page posts again!
The integrity of content on Facebook is a serious concern, and domain verification is a step towards ensuring that only verified owners can edit the way link page posts appear on Facebook.
How you can claim and verify your domain, you can read here.