Organizations using Salesforce often rely on Apex to create custom business logic and automate complex processes. Apex Security and Sharing provide the framework that helps ensure these customizations align with established security policies. Because Apex code can operate with elevated privileges, developers must take additional steps to enforce user access restrictions and data visibility rules. This includes applying sharing settings, validating object permissions, and respecting field-level access controls. Proper security implementation helps ensure that users can only view and modify records they are authorized to access. It also reduces the risk of exposing sensitive information through custom applications and integrations. By combining secure coding practices with Salesforce's built-in security model, businesses can maintain data integrity, improve compliance, and create a safer environment for users across the organization.