I favor your statement as I know that how much is that advertisement effective. I know that how much will your friends and family affected with any of your review for any product on your social media profile. If they will see you are giving review for any product then they will try it.
That is true. I am also often convinced to give a try to a product about which my friends and my relatives share on their facebook and on their other social media network. So this is a brilliant thinking to have a system for the word of mouth advertising. It will really boost the marketing of any company.
Actually when we see someone from our friends and relatives sharing about any product then we often go for that and the reason is that we know these people personally and we know about their behaviors and we know that they will not share any thing bad which will not benefit us so we go for that.