viral marketing
noun[U]
MARKETING,INTERNETukus(alsoreferral marketing);(viral advertising)amarketingactivityin whichinformationabout aproductspreadsbetweenpeople,especiallyon theinternet:
Unlessyourcustomersareyoung, aviralmarketingcampaigntargetingsocialnetworksmay notearna highreturn.
In manywayshand-heldtechnologiesare thekeytoviralmarketing.