What is this used for?
To brand your web site
Why set up this functionality?
It is to make a tiny personalized icon show up in the tab of users browser when they visit your web site, giving your site a nice extra touch and a more personal feel.
So how did you do it?
① First, I decided on what image I wanted to use so I headed over to my trustworthy image library Stockunlimited and surfed around a bit. Found this icon set:
② Then I extracted the cute little ghost guy in the top left corner
③ Resized him to a smaller size, more suitable to use as a favicon
Applying the favicon:
I followed this excellent tutorial:
https://www.ghostforbeginners.com/how-to-add-a-favicon-to-your-ghost-blog/
It is a very easy-to-follow tutorial that should have your favicon up and running within minutes.
ADDITIONAL INFORMATION
Making a Favicon
How to make an actual favicon is outside the scope of this tutorial but here is a good article that explains that very well: http://blog.teamtreehouse.com/how-to-make-a-favicon
TIP: If making a favicon is not something you want to spend time doing, I recommend you outsource it to a freelancer on a service like Fiverr and get them to do it for you for a few dollars. This is not something you should have to spend a lot of money on.
Reference Links:
https://www.ghostforbeginners.com/how-to-add-a-favicon-to-your-ghost-blog
http://academy.ghost.org/how-to-add-a-favicon-to-your-ghost-blog
http://blog.teamtreehouse.com/how-to-make-a-favicon
http://www.stockunlimited.com