What Is Post Thumbnail ID in WordPress?

In WordPress, post thumbnails are a way to show a preview of a post or page in the WordPress Media Library. They are automatically generated based on the post or page’s media file name.

You can control the size, style, and URL of your post thumbnail.

Although you can add custom post thumbnails, WordPress currently provides a few premade styles that you can use. The most common of these is the “thumbnail” style, which uses a small image that is attached to the post as a thumbnail.

When you create a post or page, WordPress automatically generates a thumbnail using the post’s media file name. You can control the size, style, and URL of your post thumbnail.

The most common of these is the “thumbnail” style, which uses a small image that is attached to the post as a thumbnail.