drip advertising
noun[U]
MARKETINGukuscontinuoussmallamountsofadvertisingfor aproductorserviceover alongperiodoftime:
Dripadvertisingensuresabrandisconstantlyin thepubliceye, and is moreeffectivethan onemajor,short-livedcampaign.
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drip campaign
drip marketing
drip method