Guerrero was a member of the panel judging the Glass Lions: Lion for Change award at Cannes, which included live assessment sessions. Here's his report on what made the winning campaign win.
In the old days of, say, 2004, America's nightly primetime TV news bulletins were the dominant campaign battleground.
Despite being outspent by a wide margin, the new Philippines president captured voters because of his apparent authenticity and social-media savvy.
From data to selfies to how brands make headway in the Philippines.
David Guerrero, chairman and chief creative officer of BBDO Guerrero, reports from inside the Outdoor jury room, where 17 heads were better than one.