How to do SEO of images and content in Shopify? To do SEO of images in Shopify, go to Online Store from your Shopify admin, and then click Themes. After clicking on Themes, a new window will appear. Here, find the theme in which you want to do SEO of images, and then click Customize. After clicking on Customize, a side bar menu will appear. Now, click on Slideshow. After clicking, next side bar will appear. Now, click on Slide. When you click on Slide, image settings will appear. Now, click on Edit. After clicking, a popup window will appear. Here, add Image alt text to improve SEO of your image.Click Save button after writing Image alt text. When you finish all the settings, make sure to click Save button at the top right corner of your screen.