Hi Josh,
Please find below details-
Business Relation: You can use business relations to indicate the business relationship you have with your contacts, for example, a prospect, bank, consultant, service supplier, and so on.
Industry Group: You use industry groups to indicate the type of industry to which your contacts belong, for example, the retail industry or the automobile industry.
Web Sources: You can use web sources with your contact companies to identify, for example, search engines and web sites, on the Internet that you want to use to search for information about the contacts. When assigning web sources, you specify which search engine and search word the application will use to find the requested information.
You can define this for any of the the contacts. In order to define this for contact , Go to Contact Card - NAVIGATE Tab - Click on Company and Assign Business Relation, Industry Group or Web Sources.

After assigning the Business Relation, Industry Group or Web Sources. you can Go to Departments/Sales & Marketing/Setup/Business Relation Or Industry Group or Web Sources and check how many contacts you have related to particular Business Relation or Industry Group-

Hope This Helps!!