What are Change Sets and what are their key limitations?

Change Sets are a point-and-click deployment tool for moving metadata between connected Salesforce orgs. Key limitations:

1. Only works between orgs with an established Deployment Connection (e.g., sandbox to production).
2. Cannot delete metadata — only adds or updates.
3. Does not support all metadata types.
4. No version control integration.
5. Deployment can fail if dependencies (e.g., field referenced in a validation rule) are not included. Best practice: always validate a change set before deploying. For more robust, scalable deployments, use Salesforce CLI, Gearset, Copado, or unlocked packages with proper CI/CD pipelines.