PPC Response Rate SEM Word of Mouth 
Zoominfo
FEBRUARY 1, 2018
For B2B software marketers, however, the top sources of new business are organic search, SEM/PPC advertising, and word of mouth referrals ( source ). Lead-nurturing emails get 4-10x times the response rate compared to standalone emails ( source ). Outbound leads cost 39% more than inbound leads ( source ).
Zoominfo
JULY 24, 2019
For B2B software marketers, however, the top sources of new business are organic search, SEM/PPC advertising, and word of mouth referrals ( source ). Lead-nurturing emails get 4-10x times the response rate compared to standalone emails ( source ). Outbound leads cost 39% more than inbound leads ( source ).
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