German term (edited): �Marketing hei�t G�ste gewinnen und G�ste halten!�

I think "all about" is the most idiomatic way of doing this (see examples below). Also, I'd stick with "winning". After all, winning customers is a common phrase.

What is Marketing?
... If business is all about people and money and the art of persuading one to part from
the other, then marketing is all about finding the right people to persuade ...
www.zeromillion.com/marketing/ten/marketing.html - 38k - Cached - Similar pages

Successful e-marketing is all about web site promotion
E-marketing Tools and Strategies. How do you get people to come to your
marketing web site? That is what everyone is trying to learn! ...
www.emarketingman.com/internet-marketing.shtml - 42k - Cached - Similar pages

Marketing Plans Versus Marketing Strategy
... come. Marketing is all about leting people know about the product
or service you offer, and persuading them to buy or use it. And ...
sbinfocanada.about.com/cs/marketing/a/marketingplan.htm - 19k - Cached - Similar pages

So You're Thinking About A Marketing Career
... Badge is a strong brand image geared to what kids and young adults in major cities
relate to, think, feel and buy. That's what marketing is all about. Great! ...
www.black-collegian.com/ issues/1998-12/marketing12.shtml - 34k - 5 Aug 2004 - Cached - Similar pages

Is Network Marketing Just a Scam?
... Just follow the simple, proven and duplicable system that the good companies
provide. The real key is this: Network marketing is all about leverage. ...
www.entrepreneur.com/Your_Business/ YB_SegArticle/0,4621,285135,00.html - 39k - Cached - Similar pages

ic Wales - Email marketing is all about timing
... Email marketing is all about timing Jul 9 2003. Simon Newsam, The
Western Mail. SEPTEMBER 11 was a bad day for humanity and to most ...
icwales.icnetwork.co.uk/0300business/0100news/ content_objectid=13157400_method=full_siteid=50082_headline