In many respects marketing by word of mouth can be said to be the “hidden statistic” for all programs, as it’s well near impossible to actually gauge the effectiveness of marketing done this way. Saying that, however, it should be noted that almost every product in this increasingly digital age has, at one time or another, relied on this method of marketing to increase public and corporate awareness of product or service availability.

A recent study exemplified that two thirds of online marketing is expected to be done this way next year, which when coupled with the advent in leaps of Web 2.0.0 social networking and social marketing sites point towards promoting your product by word of mouth may be both more cost effective, and have an increasingly better ROI than more “traditional” online advertising media.

Think about the business model of the current social networking sites. There has yet to be a successful site of this type that charges, instead relying as they do on advertising income to turn a profit. While there is not in a real sense a metric that can be used to measure the effectiveness of marketing by word of mouth, it should be noted that there is one method of knowing if your campaign is succeeding – sales.

A company or client should know from their output volume exactly what the difference between before a campaign, during a campaign and after it’s stopped. This gives businesses a measurable statistic to show effectiveness of this type of marketing. It is true that not all businesses need or desire this form of sales technique, but is also through that not one business turns away prospects garnered from the by word of mouth method either.

Whatever your area of expertise, a study completed by Hill and Knowlton this year showed that decision makers are highly influenced by personal experience’s (58%), with recommendations tied at 51%. Coming in lower than expected was direct marketing at 21% with internet advertising lat 17%. These figures may only reflect the purchasing habits of key decision makers, but a young lady in Oregon deciding to buy one car insurance or another IS the key decision maker for that purchase, and her buddy Becky telling her to go with this company over that company will have a greater influence than any gravel-voiced actor pushing the product in a TV advert.

Essentially, this statistic can reflect any industry, any segment, if each purchaser is the key decision maker. This makes the resurgence of the world’s oldest sales tool a given – so get talking or tweeting, but tell everyone!