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Depends on the type of target users -

Facebook has all types of users (tech savy, non-technical) so they display the name along with user icon.

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While the majority of Twitter users are tech savy so they don't feel the need.

enter image description here

Edit:

Responding to Hanky Panky's comment -

Twitter is also somewhat more popular among the highly educated: 29% of internet users with college degrees use Twitter, compared with 20% of those with high school degrees or less. http://www.pewinternet.org/2016/11/11/social-media-update-2016/


In the United States, almost 50% of all Twitter users are younger than 50. Research conducted by the Pew Research Centre in 2015 shows that male Twitter users slightly outnumber female. In Australia, data suggests usage is evenly spread across genders. Twitter users tend to have at least some post-school education, live in urban areas and earn above average incomes.

There are more than 2.9 million Twitter accounts in Australia. A 2016 Sensis social media report found that about 19% of Australian internet users used Twitter, compared with 95% who used Facebook - the most dominant social networking service. https://www.business.qld.gov.au/running-business/marketing-sales/marketing-promotion/online-marketing/twitter/who

Depends on the type of target users -

Facebook has all types of users (tech savy, non-technical) so they display the name along with user icon.

enter image description here


While the majority of Twitter users are tech savy so they don't feel the need.

enter image description here

Depends on the type of target users -

Facebook has all types of users (tech savy, non-technical) so they display the name along with user icon.

enter image description here


While the majority of Twitter users are tech savy so they don't feel the need.

enter image description here

Edit:

Responding to Hanky Panky's comment -

Twitter is also somewhat more popular among the highly educated: 29% of internet users with college degrees use Twitter, compared with 20% of those with high school degrees or less. http://www.pewinternet.org/2016/11/11/social-media-update-2016/


In the United States, almost 50% of all Twitter users are younger than 50. Research conducted by the Pew Research Centre in 2015 shows that male Twitter users slightly outnumber female. In Australia, data suggests usage is evenly spread across genders. Twitter users tend to have at least some post-school education, live in urban areas and earn above average incomes.

There are more than 2.9 million Twitter accounts in Australia. A 2016 Sensis social media report found that about 19% of Australian internet users used Twitter, compared with 95% who used Facebook - the most dominant social networking service. https://www.business.qld.gov.au/running-business/marketing-sales/marketing-promotion/online-marketing/twitter/who

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source | link

Depends on the type of target users -

Facebook has all types of users (tech savy, non-technical) so they display the name along with user icon.

enter image description here


While the majority of Twitter users are tech savy so they don't feel the need.

enter image description here