@bjaz, This line verifies whether the author taxonomy exists on the site (the taxonomies must be defined previously in the administration). If so, set the href attribute pointing to the previously defined author.
The rest of the attributes (itemprop, aria-label and rel) are used to improve the SEO positioning of the page.
Ok - I think I understand that now. I am trying to figure out what the theme designer must have been intending to do. My guess is to create an author page - but there seems to be some missing parts. I created the taxonomy item and put my name in there. I creates a URL that does not seem to be very helpful.
Not sure it there is anyone using Future 2021 theme. I would be interested in know how this needs to be configured to produce an author page with posts. Perhaps it is suppose to work with a certain plugin? Maybe Aura Authors. I am going to try that but remember it being a complex plugin to configure.
installing Aura Authors does not seem to make much difference. It is broken currently, so it is hard to say whether it would have really helped or not. The author does not seem to be maintaining it.
I just removed the anchor tag since it is producing a link that is unusable.