Is when you use the letters or words "I or Me" These are key words that you can find in a story when you are reading. When you read and you see a lot of I's and Me's Mine and My's you know it's First Person Point Of View.
Second Person Point Of View
Is when you use words like "You, and Yours" These are words you find in the story that help you find out what the Point Of View in the story is. These are the key words to find out that the Point Of View is Second Person "You and Your"