It’s the Alternative text of the Image somehow the old or text only browsers will display only text content so this purpose it will explain what it is. Alternative text also describes the image what it’s about.
<imgsrc=”sample-picture.jpg” alt=”This is Sample Image” />
Checklist for Optimize the Image alt tag
Must be relative and descriptive about the image.
All words in the key phrase must be present significantly in alternative tag.
Don’t use Keyword stuffing on this tag
Check the full key phrase presence.
Related SEO Tools
On Page SEO Tool – Let’s see how this tool help to improve the image alt tag Optimization.
Well Optimized image alt tag Example
How it’s works
Checks for the Full Phrase Presence – If Present then the Page got some Score, Not Presence No score.
Checks for all the words Presence – If all present then the Page got full Score, partial presence low score.
Not Optimized Example
Alt tag SEO is help to increase ranking in the image SERP so makes that clear and add more relative images to your content. More than thousand words an image can explain better so add images and explain your topic.
Also the image name should be like meaning and relative it’s better so try to name your pictures correctly.