Final answer:
Dropbox's referral program is a great example of viral marketing in the technology sector. It positively impacted Dropbox's growth by incentivizing users to refer friends in exchange for extra storage.
Step-by-step explanation:
An example of a successful viral marketing campaign tied to a business or technology theme is Dropbox's referral program. Dropbox offered extra free storage space to users who referred their friends, which created a cascade of shares and sign-ups, substantially increasing their user base.
This campaign had a positive impact on the business, as it significantly lowered customer acquisition costs and rapidly expanded the user base. It's a clear instance of viral marketing as it leverages existing users to spread the word, and the campaign grows naturally due to the incentive of free storage.
The campaign exemplifies viral marketing for two reasons: first, it engineered an inherent viral mechanism—referrals for free storage—that incentivised users to share within their networks, and second, it achieved impactful engagement as users actively participated in the promotion of the service which, in turn, had a direct positive effect on the growth of Dropbox.