Use this featured image or thumbnail tool to generate a simple yet cool featured image for your blog posts. As you might know, this plays a very important role in improving your SEO score. Featured images (also sometimes called Post Thumbnails) are images that represent an individual Post, Page, or Custom Post Type. When you create your Theme, you can output the featured image in a number of different ways, on your archive page, in your header, or above a post, for example.
Coupled with an engaging headline, the featured image helps grab visitor’s attention and those necessary clicks to your pages. And if you are running an online store, good quality images really do the trick!
The featured image draws the visitor’s attention to your content and indicates what your posts are about. Your active WordPress theme also determines how the featured images will be displayed on your site. While they may look different across themes in terms of size and placement, most WordPress themes have them enabled.
Ever wondered how large image sizes sit perfectly well on your mobile devices? Well, WordPress automatically resizes your images, making them work on any screen size. But if you will have to create it yourself, then make sure it is atleast 1200x628px.