In Internet marketing, the web owners generally find the term Alt text and image title as a similar thing but according to search engine optimization, the both tags are different and also have different values to it. Alt text is defined to be an optional information source for those people who have selected to put out of action to all the images in their browsers and those user agents that are simply not capable to see any of the images. The webmaster should be explained about the importance of the image and how to get the visitors interested to see it.

Images on the website are used to communicate important text-based content that the webmaster wants their visitors to read in an easier manner and find it helpful.  In addition, every SEO expert knows that image optimization also has a very significant position in attaining better search engine rankings. Webmaster always thinks about the use of Alt text and Title text in <Img> tag. In Google’s webmaster strategies, they informed particularly about the use of alternative text for the images on the website. 

The importance of Alt text lays based on the rule that search engine bots are unable to read image content the way any visitor does. The bots can read text content and to help them to recognize the use of alt attributes in the <Img> tags. It can be defined in a simple manner that, alt text helps search engine to know that what is going on in the images.