A person’s emotions or tones can be seen over the internet, just as emotions or tones can be heard when speaking with someone face to face. For example, if someone types in all caps, “WHAT ARE YOU DOING?” These words in all caps may indicate the urgency you should answer and how severe the other person is.
Using all capital letters makes the words appear loud, and words that come up in all caps deliver visibility. All caps tend to fill the space so that there is the impact of feeling that the message is more important than anything else that is said.
Technology has evolved to where a person's tone can be conveyed through the text they type. One of those things is that a person can be yelling through their text. Shouting through text can be done by writing in all caps. An example is "WHERE ARE YOU?".
This caps is likely to instantly capture one's attention and makes the message seem more important. Another indicator that a person may be shouting through text is using exclamation marks. An example of that in a sentence is "HELLO!!! ARE YOU THERE!!!". The exclamation marks emphasizes the importance of the message that is being sent.