What does marketing consulting entail?

I have worked as a copywriter and strategy developer with various advertising & Marketing firms as an employee, now i wish to do my own thing and i'm thinking it is only logical that i go into consulting because that's where i havee expertise. that's why i need to know more about what marketing consulting entails before i get into it.

Here's what the US Dept of Labor has to say:

"Marketing consulting services firms provide assistance to firms in areas such as developing new products and pricing, forecasting sales, planning and implementing a marketing strategy, and improving customer service. A pharmaceutical firm, for example, might seek advice as to whether it should remove a drug from the market, or a retail clothing chain might seek advice regarding the most effective way to market and sell its clothes—in a direct-mail or online catalog or over the telephone. Clients also might seek the help of a marketing consultant to set up business franchises or license their products."

Hope that helps!