Alt Text, or alternative text, is a word or phrase that can be inserted as an attribute in an HTML (Hyper Text Markup Language) document to tell website viewers the nature or contents of an image. The alt text appears in a blank box that would normally contain the image.
Alt text serves several functions. It is used when the image cannot be displayed, due to slow connection, an error in the src attribute, or if the user uses a screen reader. It helps in improving the SEO (Search Engine Optimization) as it allows search engines to understand the image content and context, thereby making it possible to be indexed. In addition, it improves the user experience, providing a textual alternative to the images.
The Alt Text is crucial to website SEO as it provides better image context/descriptions to search engine crawlers, helping them to index an image properly.
Alt Text should be adequately descriptive but also brief. It should include the most relevant keyword that relates to the rest of the content and always be relevant to the image.
There are several software and online tools to help you generate Alt Text for your images, such as 'Alt Text Generator', 'SEO Optimizer', and 'ImageSEO'.
Alt Text is beneficial for improving the accessibility of a website for visually impaired users who use screen readers. It also helps in improving the SEO ranking of a site as search engines factor in the use of alt text when determining the relevance of a site to a search query.
In conclusion, Alt Text is a crucial aspect of SEO and web accessibility. It is essential to write accurate and descriptive alt text to improve your website's visibility and accessibility.