The total number of social media users in United states for October 2018 across top platforms such as Facebook, Instagram, Messenger, and LinkedIn is 0.
Among them, Facebook has a user base of 0 users. Instagram has a significant user base of 0, reflecting its popularity among various demographics. Messenger, another widely used communication tool, accounts for 0 users. Lastly, LinkedIn, known for its professional networking focus, has a total of 0 users. These figures highlight the broad distribution of users across different social media platforms.