The importance of the ALT tag in images

The spider or crawlers of the search engines in charge of cataloging our web page have no way of recognizing what an image is about since they only see our source code, this is why there is the «ALT» tag in HTML.

This label helps us to explain to the spider what our images are about and therefore give more relevance to our content, perhaps its effect is not extremely important but every grain of sand helps and also depending on our theme we can have a good number of visitors through image searches.

We can go further and name our images with keywords but according to Matt Cutts explains in this video, the ALT tag should be enough information.

Better listen to him and his tips for optimizing images.