
Magners won the competition after it submitted 500 words on why it believes the Sunday newspaper market and The Mail on Sunday is important to the cider brand.
Magners has not advertised in The Mail on Sunday before.
competition in May, in an effort to lure in new or lapsed advertisers to its pages.
Mail Connected is the advertising arm of The Mail on Sunday and the Daily Mail.
The competition was open to advertisers that had not advertised in a Sunday newspaper before, or to brands that had not advertised in The Mail on Sunday (MoS) in the past 12 months (the year ending 16 May 2011).
John Teal, advertising director of Mail Connected, said: "It’s wonderful that so many agencies participated in this great competition. The standard of entries has been incredibly high and Magners is a worthy winner. We’re looking forward to proving the value of the Sunday environment and the impact which The Mail on Sunday delivers for advertisers."
Magners will receive four free full-colour pages in The Mail on Sunday – one a week for four consecutive weeks – as well as a free campaign on Mail Online, each equivalent Sunday.
Magners will also receive pre- and post-advertising effectiveness research and creative pre-testing with a creative consultancy.