Advantages:
First, it is intuitive, artistic and infectious.
Second, no matter what language people speak, they can generally understand it. Some people can call their names at a glance, and some people can leave a deep impression even if they can't call them by their first names.
Disadvantages:
It is not easy to call, especially abstract graphic trademarks, because there is no specific title, which hinders people's oral communication and is not convenient for advertising.