Why do you need alt text on your images?

[ArkPresentation]

Why do you need alt text on your images?

[RH-Calvin]

Search engines cannot read images directly on a webpage. Alt text is used with to define images in the source to help search engine spiders crawl and know about your webpage images. These tags are helpful to rank your images higher in search results.

[stuartsspindlow]

I agree with RH-Calvin that alt tag is very important for any website because it help search engine crawler to read the images properly.