When you add a modern page to a site, you add and customize web parts, which are the building blocks of your page. This article describes the Link web part.
Note: The Link web part is not available in SharePoint Server 2019.
Use the Link web part to add a link, along with its preview, to an internal or external page, video, image, or document.
Add a link
If you're not in edit mode already, click Edit at the top right of the page.
Hover your mouse above or below an existing web part or under the title region, click , and then select the Link web part.
Paste the link to the page, video, image, or document. In addition to the link text, a preview of the item will display on the page if available. To remove either the link text or the preview, click the x next to it.
Note: Links external to your site will not show a preview in U.S. Government GCC High and DoD, and Office 365 operated by 21Vianet.