You may use NP in reply to someone thanking you. NP meaning in texting is simply a polite way of saying, "You are welcome" or "It is fine." If your friend says, "Thanks for helping me with my homework," you say, "NP!" Therefore, NP is primarily used for casual conversations between friends and family. It can be associated with giving advice, telling some very important information, responding to a question, or providing help with a given situation, through the use of text. If you get this information helpful share this information with your friends.