Sharing a link
To share a web page, put its address in the Link field above the writing area. We'll fetch the page and offer a preview - its title, a short description, and an image where one is available - which shows on your published post so people can see what they're about to open.
You can still add your own words in the writing area to say why you're sharing it. If you don't want the preview image, you can remove it before posting.
A post can carry a link or attached media, but not both at once.