What is the meaning of posting Spring Festival couplets in the New Year?

It means expressing good wishes and adding festive atmosphere.

Every Spring Festival, every household sticks red couplets on their doors, which adds to the festive atmosphere. It depicts beautiful images and expresses good wishes with neat, concise and exquisite words, which is a unique literary form of the Han nationality. There is no limit to the number of words in the upper and lower couplets, but they must be equal. Common couplets have five words and seven words. The two sides of couplets should correspond. When people paste couplets and blessings at the door, it means the official start of the Spring Festival.

Spring Festival couplets were originally called "Fu Tao" instead of "Spring Festival couplets". It is said that the origin of pasting peach symbols is very early. At that time, "Taofu" was posted to drive away monsters. Legend has it that there was an extremely vicious monster in ancient times, which often did evil and endangered the people, but nothing could stop it. Later, there were two immortals who specialized in exorcism. They subdued the monster with peach branches. As a result, it was circulated among the people that I was told to hang peach branches engraved with the names of two immortals on the door, and the monsters were afraid to go forward. Later, this kind of peach branch was called "peach symbol" and "peach symbol" became popular.