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If you manage a multi authors site, it is a good practice to standardized the author profile as well as the display name for each author.
Default WordPress installation allows users to choose their display name from a dropdown in the profile page – username, first name, last name, first and last name, last name, and first name. However, if you want to force every user on your site to display their first and last name, you can simply install and activate some plugins.
On the other cases:
Nowadays, having an online presence is very important for your business. If you own a restaurant or a cafe, having a website gives potential customers an overview of what type of foods and drink they can order from your restaurant.
The possibilities are endless!