It’s easy for search engines to understand text copy on a page, however, images are difficult to read. This is where alt text comes to play. Alt text is used to describe to search engines what the image is showing, allowing search engines to give users better results when performing an image search.
Log into your Twenty Over Ten account.
Select the image that you'll be adding alternative text to.
Access your “alternative text” button from your sidebar.
After you have added the content of your choice, click the update button.
After you have clicked the update button, click the save changes button.