# Developer Knowledge hub

The Pushwoosh developer Knowledge Hub provides essential technical information about device identification and user management. This section covers the following topics:

<CardGrid>
  <IconLinkCard
      href="/developer/pushwoosh-knowledge-hub/device-identifiers/"
      icon="setting"
      title="Device identifiers"
      description="Learn how to retrieve HWID and push tokens across platforms"
  />
  <IconLinkCard
      href="/developer/pushwoosh-knowledge-hub/types-of-registered-devices/"
      icon="list-format"
      title="Types of registered devices"
      description="Understand Pushwoosh device types and notification delivery logic"
  />
  <IconLinkCard
      href="/developer/pushwoosh-knowledge-hub/users-userids/"
      icon="heart"
      title="Users (User IDs)"
      description="Learn how to manage User IDs and link devices"
  />
</CardGrid>

<Aside type="tip">
For omnichannel campaigns, data collection practices, and security certifications and compliance, see the [Product Knowledge Hub](/product/pushwoosh-knowledge-hub/).
</Aside>