The examples of social marketing

People can participate in the events and the companies give people not only some free products but also so much pleasure. This is social marketing which is already common in other countries. It's easy to spread through social media like twitter or facebook, so it can affect people easily and quickily. It's a really cheaper way to advertise somehing than by other media like TV commercials, newspapers, and magazines. Wish we had these kind of eventful things around us through social marketing.