C1 Viral Marketing

When word of mouth turns to word of mouse.

On December 16, 1998 Iconocast gave the award for Internet marketing buzzword of the year to the term 'viral marketing', but what does it really mean? The concept itself was by no means new, businesses world-wide from the smallest corner shop to the biggest multinational had long relied on and benefited from it.

https://learnenglish.britishcouncil.org/en/magazine/viral-marketing