It is a popular form of internet slang that Facebook, Instagram and other social media users typically post in a status update to get more engagement from their friends or followers.

When used in a status update, Facebook users typically start with the LMS expression (asking their friends to hit the like button on their status) and then add a reason or some sort of reward for doing so. They may also use it as a way to get friends to participate in a game where the poster sends everyone who has liked their status a personal message, photo, or something else.

Using LMS on Facebook is just a trendy way to get more likes and find more interesting ways to communicate with friends. Similar trends exist on other social networks.

Used for a reason or agreement.