How To Avoid Creating These Terrible Favicons
performancing.co.uk
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Favicons, those 16X16 ico files which represent a particular URL have been known to be pretty, but there are some favicons out on the web that are just plain awful. Despite their size, a good favicon helps out your readers in a number of ways. For instance, if you use FireFox and have a number of tabs opened, each tab displays the favicon of the website that tab has loaded. Also, a favicon that has been aesthetically designed will give your site a better chance of being seen when mixed in with a ton of other websites. Not to mention, a great favicon would inspire other designers as well as possibly having your site featured in a post which discussed the best designed icons.