Read this article. Social media has avenues to advertise products or services. It is important to use social media with a purpose and plan. It is a way to create impressions, build equity, and sell products or services.
Media convergence
New digital media devices inherit many qualities and functions of older media and forms of communication.

Mobile Phone Evolution: The shapes of mobile phones have evolved over time to become less similar to older analog phones.
Here's
an example: When your phone camera snaps a digital photo, it probably
makes this sound or something like it. That sound is the sound of a
shutter opening and closing. It is a sound that analog (non-digital)
cameras have to make in order to function.
Digital
cameras don't have shutters; they function through chips that sense
light coming into the lens. So why do so many digital cameras make that
shutter sound? Because developers wanted your device to signal to you
that the photo was taken, and that sound has become associated with
picture taking in our society. Media scholar Henry Jenkins calls this
type of blending of old and new media "technological convergence".
(Convergence just means coming together while moving through time).
Technological convergence is one of several types of media convergence
that Jenkins writes are crucial to understanding our media world today.
Our
technologies are full of convergences with older, traditional media
helping us make sense of new media. Some signs of technological
convergence go away over time as we become more comfortable with
technologies. For example, mobile phones were once shaped more like
analog phones, which helped people feel more comfortable calling and
talking on them. However, as they gained more entertainment-related
affordances, they began to appear more like remote control devices.