Multi-tenant Architecture is a software architecture pattern where a single instance of an application is used by multiple customers, also known as tenants. In a multi-tenant system, each tenant has its own data and configuration settings, but shares the same underlying application and infrastructure.

Here are some key components of multi-tenant architecture:

1. Shared Infrastructure: In a multi-tenant architecture, the infrastructure and resources, such as servers, databases, and network, are shared among multiple tenants.
2. Tenant Isolation: Each tenant has its own data and configuration settings, and is isolated from other tenants to ensure data privacy and security.
3. Customization: The multi-tenant architecture should allow for customization to meet the specific needs of each tenant, such as branding, user roles, and workflows.
4. Scalability: Multi-tenant architecture must be scalable to support a growing number of tenants and users without impacting performance and availability.
5. Security: Multi-tenant architecture must ensure data security and privacy, such as encrypting data in transit and at rest, and implementing access control and authorization.

Multi-tenant architecture is commonly used in software-as-a-service (SaaS) applications, where multiple customers subscribe to the same software application. This architecture can provide cost savings, easier maintenance, and faster deployment compared to traditional single-tenant applications. However, multi-tenant architecture also requires careful design and implementation to ensure the security, scalability, and customization needs of each tenant are met.