Number of Images tells the writer how many picture placeholders to place after relevant sections, each with a detailed photo description and SEO alt text. When the article comes back Sprwt generates a real image for every placeholder ($0.36 each, requested at 1024x1024) and stores it in your site's blog media folder; if an image cannot be generated the placeholder is replaced with a grey Image Not Available picture you can swap later. When you click Save Blog Post a wide featured image is also generated from the title ($0.48, requested at 1792x1024) and used as the post's cover and social-share (SEO) image. You can replace any picture in the post editor afterwards.