A public cloud landing zone is essentially a well-prepared environment within a cloud provider's infrastructure—like AWS, Google Cloud, or Microsoft Azure—that is set up to facilitate and secure the deployment of an organization's applications and services.

When discussing this in a job interview, you might want to highlight the following points:

Concept Understanding:

1. Framework for Adoption: A landing zone represents a structured approach for an organization to onboard to the cloud. It's a predefined architecture that includes all the necessary components for governance, compliance, security, and operations.

2. Standardization and Best Practices: It enforces high standards and best practices that significantly simplify the process for engineers by providing a controlled environment that speeds up development and deployment.

3. Multi-account Strategy: Particularly in AWS, a landing zone can involve setting up multiple accounts for different departments or teams. This strategy enhances security and segregation of resources.

4. Security and Compliance: Security rules such as identity and access management, encryption, and network configurations are pre-set according to the organization's policies and the public cloud provider's best practices.

5. Scalability and Reliability: The landing zone is designed to handle growth, allowing resources to expand or contract as necessary. It provides a resilient architecture that ensures high availability and disaster recovery capabilities.

Implementation Details:

1. Automation: Landing zones often deploy infrastructure as code, meaning that they automate the creation and management of cloud resources. This makes it faster and less error-prone compared to manual setups.

2. Ready to Use: It provides a consistent and ready-to-use environment for developers to start deploying resources immediately, without needing to configure basic settings for each new project.

Business Benefits:

1. Accelerated Cloud Journey: A well-designed landing zone accelerates the cloud migration process by addressing common setup requirements upfront.

2. Cost Management: Encompassing tools and policies for managing costs and ensuring that expenditures stay within budget.

3. Operational Efficiency: Streamlines workflows and operations, making it easier to manage cloud environments across different teams in an organization.

In a job interview, emphasize how a cloud landing zone aligns with modern cloud best practices, ensuring that a company's move to the cloud is secure, efficient, and scalable from the get-go. Be prepared to discuss how you could contribute to setting up, maintaining, or optimizing a cloud landing zone, leveraging your skills and experience in the field.