The digital director of Donald Trump's presidential election campaign has revealed how he helped get the businessman elected.

Brad Parscale, a man who's been described as "the genius who won Trump's campaign," by The Washington Post, said that Facebook had helped spread Trump's message to voters.

Speaking at the Web Summit in Lisbon, Portugal, on Wednesday, Parscale said that his background in advertising and marketing helped him see that Trump was a "great product" who was easy to promote to the American public.

"I think I had come from a consumer world for a long time and America and eyeballs were moving to social media in huge numbers, especially on mobile phones and devices. And when Donald Trump asked me to work on the campaign I also knew I had a great piece of product that would resonate with Americans," he said.

"You want a great product, you want things that resonate with people and make them dance."

The election of Trump to the U.S. presidency a year ago was largely credited to an internet campaign led by Parscale that utilized social media platforms such as Facebook to spread his political views, a strategy first employed with success by his predecessor Barack Obama.

In October, Parscale credited Facebook with helping to fuel Trump's win last November, saying during an interview with CBS News that the Trump campaign had Facebook employees "embedded inside our offices" to explain how to use the platform to target voters. Facebook said in a statement that it had offered both the Trump and Clinton campaigns "identical support."