To learn the secret to accessibility, you must navigate this page without a mouse and answer the questions correctly. (Hint: start with the tab key).
What's the difference between a link and a button?
Buttons make something happen, like submitting a form or showing a popup message. Try it out with the spacebar.
Links take the user to another place, be it a skip link to another element in the same page or to another page entirely. This link looks like a button. Try it out with the enter key.
If it goes somewhere, it's a link