Activity will include the creation of an online cooking show and a website, and the management of social media channels.
LMFM will also work with Google and Unilever’s margarine team to tackle myths about the category and promote its benefits.
LMFM won the brief after a competitive pitch.
Work will launch in five markets this summer before rolling out globally as part of an ongoing initiative to grow the margarine category.
Tom Bazeley, a managing partner at LMFM, said a "breadcrumb trail of content" would take users from search on a "journey through many different parts of the category story".