Second person is a point of view (how a story is told) where the narrator tells the story to another character using the word 'you.' The author could be talking to the audience, which we could tell by the use of 'you,' 'you're,' and 'your.' 

Stories and novels written in the second person exist, but they are much rarer than narratives written from a first- or third-person perspective.

Why selecting this P.O.V.?

It’s widely considered the most daring POV in fiction, and the novelty of such a perspective can amuse the reader. Also, 2nd person immediately makes the story personal, grabbing the reader by the collar and pulling them in.

2nd person transports your reader directly into the story, making them grapple with whatever the book says they are doing. Especially if this “you” in the book is doing something strange or uncomfortable. And if the you is doing something spectacular, it’s a special experience for the reader to imagine themselves as that person.

Why it's not popular?

Because people like to imagine a story outside themselves, in order to escape, and 2nd person brings the story uncomfortably close.

It’s weird to tell the reader what they are doing. It’s kind of an affront. After all, if you were telling your friend a story about yourself, would you tell it as if they were the person in the story?

Plus, even though the main strength of 2nd person is that it makes the reader identify with the narrator, it’s just as easy to make the reader identify with the main character using “I” or “he/she.”

2nd person POV works much better for short stories than novels. It’s very difficult to pull off and will likely alienate most of your readers. Yet despite all those problems, it’s a lot of fun to write.

Things to keep in mind while writing this-

1. Use the Correct Pronouns: ‘You, your, yours’

There is no “I” character in 2nd person. There can be “he” or “she” when the narrator is talking about others, but you should never use the word “I.” Just make sure to be very consistent with your use of the 2nd person.

2. Make the Narrator a Full-Fledged Character

Authors who attempt 2nd person sometimes forget to give lots of details about the main character, because it feels awkward to tell the reader what their sexual preference is, what foods they like, and where they live. But that is the nature of 2nd person. The most common mistake authors make when writing 2nd person is making the narrator into a cardboard character without any details or identity. So go ahead, tell the reader exactly what they are like!

3. Read a Lot of Second Person

Second person POV is not an easy task to learn. But, like any other project, you should always do some research. The worst thing any writer can do is to ignore reading entirely and just write. Once you start immersing yourself in that perspective, it will become easier to write.