An image’s alternative text is a description of the image, or if the image links somewhere, a description of where it links. Alt tags are important because search engines look for and read them to gain more understanding of the page content. Alt tags are also useful for screen readers, so they help make your website accessible.
WordPress 4.9 and earlier: Once you have uploaded your image or chosen it from the Media Library, you will see your image on the right side of the screen, along with size and alignment options.
For WordPress 4.9 and earlier: Learn how to add images to enhance your posts and pages.
For WordPress 5.0 and later: Learn how to add images to enhance your posts and pages.