You can have a look into below article

https://pdn.pega.com/documents/pega-knowledge-731-user-guide

Thanks,

Arun

The Pega Knowledge taxonomy provides a flexible, hierarchical category structure, which can be modeled in a number of ways, depending on the knowledge management's organization goals and needs for classifying content.  Some businesses align their taxonomy category to their organizational structure (e.g. Sales>internal, Sales>external, Service, Marketing, etc.  Some businesses model their taxonomy to reflect their product or service lines, so it really depends on how this Tech company wants to classify their content.

From an opportunity management perspective, I'd need more details on what the business requirements are prior to providing guidance.