1. Protection of personal privacy: This is a self explanatory measures that prefers a maximum protection over individuals privacy thereby creating an avenue for safety of one's personal information overtime.
identity theft is not uncommon especially with how easy it is to access everyone’s data these days. Your information can be used against you so protecting it with maximum care is always a must.
2. Protection from online harassment: we are all aware of the harassment ravaging social media and how it has really caused alot of people so much but the indulgence of anonymity can provide protection from all this online bullies and guarantee one's security by shielding them from such harassment.
3. Freedom of expression: This part is very necessary cause it makes an individual to grow without fear and doubts and enabling them to express their opinions and thoughts freely,if they have the option of remaining anonymous.
in many social medias, you can hide under an alias or a pseudonym and be able to say what you want without the fear of having your personal life used against you. on the other hand though you should also be able to handle responsibility of being anonymous.
being anonymous has given people too much control and confidence to say what they want which often lead to harassment of other people on internet spaces