The Drag & Drop Featured Image plugin is a way to easily set the featured image of a post.
Using this plugin will help bypass the need to help upload an image, then manually set it as the featured image.
However, by using the drag and drop feature, you have to take one extra step to insert the image into the post itself. If you regularly insert the post into the image, you may want to stick with the traditional media upload method — it really depends on your typical editing flow.
The alternative to this plugin is to upload an image and then use the Automatically Set Featured Image code snippet we’ve previously released.