Sometimes reports on industries, such as an annual review, come out in their trade journals - found in these databases. Use search terms such as “market,” “forecast,” “trends,” “industry overview,” etc. along with your own industry identifier, i.e. “marketing."
Find market size, industry leaders, statistics, current status, future trends, histories and profiles of the industries here. If you look up the NAICS codes for your industry first, this will be a bit easier. Industries include: marketing, finance, and more!