Viral refers to content—such as videos, images, articles, or social media posts—that spreads rapidly and widely across the internet, often through social media platforms, messaging apps, and email. When something "goes viral," it means that it has been shared, viewed, or engaged with by a large number of people in a short period of time, typically due to its relevance, humor, shock value, emotional impact, or uniqueness.

Viral content can range from funny memes and heartwarming stories to shocking news and misinformation. The term "viral" is used because the spread of such content mimics the way a virus spreads from person to person, rapidly reaching a large audience.

While going viral can bring significant attention and recognition to a person, brand, or cause, it can also lead to the spread of misinformation or harmful content if not properly verified. Viral content can have a powerful impact, influencing public opinion, trends, and even political and social movements.

In January 2019, BOOM fact-checked a viral claim that former British Prime Minister Tony Blair said 'India's future is safe in Rahul Gandhi's hands.'

BOOM found that while Blair had met Gandhi recently in Delhi, no such statement was made by him. The fact-check also recalled what Blair had said about Rahul Gandhi in 2008.