Using buttons when designing a website could be a better solution to indicate actions. On the other side links usually tell users that they will be taken to another page.
In the two examples taken from WebMD, the health website, buttons clearly indicate the beginning of a process or action. In both cases using links would have been not totally correct, creating a little bit confusion to users.
[...] used when user input is required. For example a "vote" or "add to cart" button (see more on action buttons). "Placing a checkout button on a visible location is very important and will prevent users [...]
In Art the word design indicates what?
Well, I think art and design are two different things… don’t you think?
thats for sure, brother