Selecting a featured image will set it apart from the other images loaded into your post, page or ProPhoto gallery in WordPress. Featured images are used in many ways, including:
- Facebook previews
- blog excerpt views
- ProPhoto Grids
- featured image widgets
- featured image backgrounds
- …and more
By default, WordPress will use the first image uploaded to your post/page/gallery when it needs to make a thumbnail. But you can override this by setting a featured image.
NOTE: to add featured image support for blog categories, install the Category Featured Images plugin.