Facebook is dusting off its data and showing us how we laugh online. When we laugh online, there are many ways we type it to convey it to others. For example, some people prefer a simple “lol,” while others use the traditional “HAHAHA.” Of course, there are also those who share their laughter with a more modest “hehe.” It really depends on the person behind the keyboard.
It seems that, according to recent statistics posted by Facebook's research team (WIRED), certain types of laughter are associated with specific groups of people. 
In their study of online laughter, they found that emojis are used more by women to convey laughter than by men.
“Haha” was found to be the most popular way of conveying emotion and was used more by men than women.
“Hehe” again ranks very low and once again it is found that men use it more, although it seems to be used to a marginal level by women as well.
Strangely enough, "lol" doesn't seem to be as popular as many might think and is found to be the least used way to share laughter.
The research team also found that in Seattle, “haha” was the most popular way to laugh online. In Chicago, however, emojis proved to be the dominant method, and “hehe” is used a lot in San Francisco.
Phoenix, on the other hand, was found to use “lol” more than the other cities that participated in the survey.
Another study from Facebook, which continues to analyze the data it collects by learning about human behavior. And if you don't know why this study is needed, Facebook does.
