Answer:
The correct word for the blank space is: Social media.
Step-by-step explanation:
Social media marketing is an online-based advertisement that aims to be promoted by consumers who share the content of the promotions among their contacts. Because of the increasing and massive use of different social media as means of communication, the advertisement is likely to reach its target audience faster than through other media like television or radio.
Most retailers are implementing the use of social media marketing to let consumers know about their promotions.