Nexus supports three main types of repositories:
1. Hosted Repositories:

• Store artifacts directly in Nexus
• Used for internal artifacts and builds
• Example: Internal Maven snapshots, private npm packages
  2. Proxy Repositories:
• Cache artifacts from remote repositories
• Reduce external network calls and improve build performance
• Example: Proxying Maven Central, npm registry
  3. Group Repositories:
• Aggregate multiple repositories into a single endpoint
• Provide unified access to hosted and proxy repositories
• Simplify client configuration by using one URL
  Example configuration hierarchy:

maven-public (group)
├── maven-releases (hosted)
├── maven-snapshots (hosted)
└── maven-central (proxy)