Alt is not a valid attribute for <a> elements.
- Use alt to describe images
- Use title to describe where the link is going.
- The textvalue (click here) is the most important part
The title attribute gets more and more ignored.
Google looks far more on the link text than the title attribute.
For google the title tag is like a meta tag which is not important compared to content. - Image alt tags are however still very important (especially for image search)
- The main feature of those tags is to provide usability for your users, not to feed informatino to search engines.