Marketing Analytics and Strategic Help - Media Agency. MASH is a local media agency located in Stockholm, Sweden. Working closely with our clients we offer marketing consultant services as: marketing and media planning, marketing strategy, market analysis, target group analysis, econometrics and sales analysis, cross media advertising, creative integration, digital marketing, paid, owned and earned advertising implementation, campaign planning and implementation, channel mix and reach optimasation and, of course, always giving you performance reports along the way and a final result score sheet. The purpose of marketing is to create the largets positiv return on investment possible - we know how, welcome to MASH.