Social media has changed the world, connecting people across the world, talking about some controversial things, and ideas made possible all using social media, even though Social media isn't the easiest thing to make popular.
Social media is the most used as a form of communication with friends. When you are at home you can only talk to a few people, unless you call them over using social media or call/text. Social media is free so it would make more sense to use the free thing instead of paying to call/text someone.
Creating a social media app is easy and might get five to fifteen bugs to fix, but getting it popular needs a good idea and useful things on it. There are so many useful social media apps out there that you might not find useful but others might do.
Social media is a platform for ads and communication between people. Social media has helped with requesting supplies to and promoting businesses. The sites make money off the ads, so the site gets money for helping out businesses with their sales and communication because it's the only way to get paid for it.