Terraform 0.14 introduces a concise diff renderer to improve understanding of Terraform's behavior, adds sensitive input variables and extended provider schema sensitivity, and includes a new dependency lockfile to simplify managing Terraform automation. The release also supports Linux ARM64 builds, forward compatibility for state files, and provides additional validation conditions for variable validation. New users can learn about the features by reviewing documentation, trying HashiCorp Learn tutorials, and locking and upgrading provider versions to protect sensitive input variables.