Custom models in GitHub Copilot allow the tool to learn from the specific code patterns and practices within your repositories. This results in suggestions that are more aligned with your organization's coding standards and conventions, improving the relevance and accuracy of the generated code.
Reference: GitHub Copilot Enterprise documentation on custom models.

Exact extracts:
* "You can give Copilot Chat additional context using variables such as @workspace or @file to scope the conversation." References: GitHub Copilot Chat variables and context documentation.

Exact extracts:
* "You can accept individual words, lines, or entire suggestions with keyboard shortcuts." References: GitHub Copilot editor usage documentation.

GitHub Copilot Knowledge Bases is an Enterprise feature that allows the tool to use an organization's internal documentation and code for more accurate and relevant suggestions.
Reference: GitHub Copilot Enterprise Knowledge Base documentation.

"Enterprise administrators can configure content exclusions to exclude entire repositories, folders, or specific files from being used by Copilot." This confirms that files, folders, and repositories can be excluded, but not individual lines or gists.
References: GitHub Copilot content exclusions documentation.