Upload an image into a WordPress site's media library from a public URL, optionally setting it as a post's featured image in the same call.

If the user has the picture on their own computer, call upload_image first to turn it into a public URL, then pass that URL here. Set post_id together with featured=true to make it the featured image of that post or page, which is what Elementor loop grids and most themes display on cards. Always give alt text: it is what screen readers and search engines read.