The alt tag, also known as the alt attribute and alt description, is an HTML tag that is applied to images. Here, the content of the respective image is briefly explained in text form. Such tags primarily enable search engines to recognise the added informational value of image content. Without these descriptions, the services can only perceive images as such, but can hardly categorise their value for the pages in question.
The alt tag actually has various functions. It usually works in the following contexts:
The information in alt tags ensures that users and search engines can better understand the content of websites.
The orientation support contributes significantly to pages being used more intensively. For Google and other search engines, this is a clear indication of a good user experience, which can have a positive effect on the ranking. In turn, the easier it is for search engines to scan pages and their content, the more regular and accurate the ranking assessment will be.
Alt text also offers another opportunity to include important keywords. As the use of keywords is still a central factor for search engine ranking, this opportunity should always be utilised.
In addition, alt tags or alt texts are a ranking factor for the image search of the major search engines. If you want your image content to appear at the top of the list, you should not do without appropriate descriptions.
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