During Brazil's tightly contested presidential run-off election, digital strategy played a pivotal role as over 10 million supporters joined a dedicated WhatsApp channel to boost the campaign of Luiz Inácio Lula da Silva.

The high-stakes second round followed an initial October vote where right-wing senator Flávio Bolsonaro led with 47% to Lula's 45%, falling short of an outright majority. As voters headed to the polls amid concerns ranging from the economy and crime to democracy and welfare, the massive mobilization on messaging platforms underscored the growing influence of digital organizing in modern Brazilian politics.