There are a million different help documents, feature lists, and explanations scattered across Zoho’s many different sites. The trick is knowing where to find what you need.
The Zoho Community and Zoho Knowledge Base pages are extremely helpful.
Also, each application has its own documentation (not to be confused with API documentation). These are very useful for learning about different features, navigating the applications, and discovering possible integrations or build-outs you could set up. See, for example, the Zoho CRM Documentation.
This is the first result from a simple ‘Zoho CRM Documentation’ search in your browser. It is a central hub from which you can reach customization, integration, developer options, and more.
Try something similar with Zoho Desk, Zoho Analytics, and many other apps.