Q) What simple fact do you wish more people understood?

A)

I wish for more people to know how to use a smartphone.

Actually, many peolple = people can use a smartphone even now.

But, most of senior citizens aren't accustomed to use it.

There are many advantages coming from using it.

Fist of all, we can seek the way to go anywhere by using a smartphone.

Second, people can search for something anywhere which they want to know.

Finally, by using it, people can take a picture. Furthermore, they can send it to someone.

In addition to these, there are many reasons why it is usefule = useful to use a smartphone.

Comment:

~ You were able to construct your sentences well. Keep it up Jae-Kyung. Study harder! :)