Summary of SEO principles for ALT attributes in images

The SEO principles of ALT attributes are summarized as follows:
1. The ALT text of non-linked images should be considered from the image description perspective. Although Google reads the text, it is much less important than the text in the text.
In view of Google's belief that pages with ALT attributes are more friendly to readers than those without ALT attributes, ALT attributes should be added to all images. For those images that only have typographical functions, you can use the empty ALT attribute (alt = "").
The keywords on this page can also be properly considered for ALT text of non-linked images, because they may benefit other search engines such as Yahoo.
2. For ALT text of a link image, you should add keywords from the SEO perspective. Note that the keyword here should be the keyword of the webpage to be linked, rather than the keyword on this page.