This post exists only to show how the Media page works. Everything you see on the card above came from this post: the photograph is the Featured image, the heading is the Title, the line underneath is the Excerpt, and the badge is the Category.

To add a real entry, go to Posts → Add New in the dashboard, write a short description, set a featured image, tick one of the Media categories, and publish. Any additional images you place in the body of the post will appear as thumbnails here and can be clicked to enlarge.

When you no longer need this example, open it from Posts and move it to Trash.