Shared capabilities

I am writing my thesis about Microsoft Purview. And something is not very clear to me about the shared capabilities. So I know Microsoft has the platform and the product shared capabilities. The platform shared capabilities are the foundation for Purview. Like audit logs and retention labels etc. The product shared capabilities are products as Adaptive Protection and OCR. There is a lot information about the product shared capabilities on learn.microsoft.com. But is there anything I can find about the platform shared capabilities like a blogpost or a webinar?