nofollow attribute. HTML

What are ‘nofollow’ tags and when should they be used in SEO?

‘Nofollow’ tags are an HTML attribute that tells search engines not to pay any attention to links that appear on a webpage.

It was created in 2005 by the major search engines as a way of combatting link spam and dodgy SEO practices, though its impact in helping to win that fight is debatable.

Recently I’ve had a few conversations around the use of nofollow tags so thought it would be helpful to give an overview of why they’re important and in what context they should be used.