It is considered to be one of Guinness's earliest ads. 1862: Guinness adopts the harp logo as its brand. Until the late 1920s Guinness relied on word of mouth to promote its product.. When sales ...

And a viral craze online where drinkers take a big gulp to try to line up the beer with the glass's Guinness logo in a challenge called "Split the G" has also helped. Diageo began restricting the ...