Alt Text Attribute
 

Alt Text Attribute is one of on page factor in SEO. It provides an alternative text for when an image cannot be displayed, placed on every images, match primary keyword for destination.

Alt attributes is to give the description to the contents of an image file. The alt content will be shown when the visitor takes the cursor over the image. Using alt attribute is SEO friendly and this helps put your site in the search engine result pages as it improves the placement of images on your web pages in image search results.

Definition and Usage
The required alt attribute specifies an alternate text for an image, if the image cannot be displayed.

The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

As Google crawlers can not crawl an image, it is very important to add image alt txt, so that crawler understood what the images are all about.

helps to understand what the image is all about

Value Description
text Specifies an alternate text for an image.
Guidelines for the alt text:

The text should describe the image if the image contains information
The text should explain where the link goes if the image is inside an element
Use alt="" if the image is only for decoration

alt text is very important in image optimization
it comes in on page optimization

An alt tag is very useful for seo purpose and online users. It shows instead of an image that could not be uploaded due to slow downloading or speed of the Internet.

Alt tag for the images of the website is necessary as the crawler will make out about what the image is about, and when the image is not displayed properly, it will show the alt tag data.

Alt tags used for Google images it helps to identify the image because search engine can't read graphic terms.

HTML attribute that provides alternative text when non-textual elements, typically images, cannot be displayed.
ALT text is commonly omitted from web pages, from the smallest personal pages to the largest web corporate sites. Yet, if properly used, ALT text can be quite useful.

that is true with alt

It helps google to understand what the image is all about.

Alt attribute is useful for both image search rankings and ordinary search rankings.

Proper alt attributes can increase the page position in serp, and as well it will increase position in google image search

alt tags is essential for SEO, but does anybody know if the image caption matter or not?