Industry reports contain valuable analysis of an industry's operating conditions, driving forces, competitive landscape, and more.
Be aware that many do not cover smaller niche industries (e.g. pet food vs. pet supplies and services) and may not contain the most up-to-date data. Supplement these with information gleaned from news stories, magazine articles, and trade publications.
The amount of information will vary depending upon the industry and the resource used, though these resources might provide all the information you need. Be prepared to include alternate names for your industry as well as broader and/or more specific industry categories in your research.