Designers know better than anyone how logo making was changed in a time. Here is some new updates.
We used to have amazing logos:
Now we have those logos instead:
Favicon turned into a new logo standard.
This is not the end of the story. Favicon defines a small squared format which is not enough anymore.
At some point all social medias decided that your profile pic as well as company logo should fit in a circle.
As you can see all the logos fail in small circle formats.
What to do?
The main rule nowadays is that your logo should fit the circle and be easily identified and pop-up in the smallest format like favicon.