Whether you’re writing an email, a text message, or an instant message, it’s usually best to use all caps in sentences, which means you shouldn’t use all caps. Why? Because when you write all caps, recipients interpret it as the equivalent of shouting.

Below you will find descriptions of the different case studies:

While it is generally considered rude to use all capital letters, there are times when it is appropriate, just as it is sometimes appropriate to raise your voice when speaking. Such situations include when you are really upset and feel the need to express yourself freely, or when you want to draw attention to certain words or phrases.