Advertising is a form of commercial communication that helps businesses reach potential customers.
Through many social media like websites, television, or youtube. . . , people can find products they want to buy and their information without difficulty. So sellers can know who the customers they need and concentrate on recommending to consumers.
For example, when I want to buy something, I can contact marketers to be well-informed and get their help. And then, they know I am a target audience.
In the past, marketers had to go around to introduce their goods to clients. It takes a lot of effort. But nowadays, just advertising through mass media, people will know them. Everything is getting easier
Advertising is a form of commercial communication that  
helps
 businesses reach potential customers.
Through  
many
 social media like websites, television, or  
youtube
.  
.
  .
  ,
  people
 can find products they want to  
buy
 and their information without difficulty.  
So
 sellers can know who the customers they need and concentrate on recommending to consumers. 
For example
, when I want to  
buy
 something, I can contact marketers to be well-informed and  
get
 their  
help
. And then, they know I am a target audience.
In the past, marketers had to go around to introduce their  
goods
 to clients. It takes  
a lot of
 effort.  
But
 nowadays,  
just
 advertising through mass media,  
people
 will know them. Everything is getting  
easier