alt tag
How to Add ALT Tags to Images in Wordpress (a must-have for SEO!)
What is Alt text & How to write them - Image Optimization With Alt Tags | SEO Tutorials
Image Optimization With Alt Tags: How to Do Image SEO for More Traffic (Fast)
What Is an Alt Tag and How Should You Use It?
How to use Image Alt tag in HTML. Very Easy!
How to Write the Perfect Image Alt Tags in WordPress