Worked on updating documentation in the DataDog/documentation repository to reflect the expanded regional availability of AWS CloudWatch Metric Streams in the us3 region. Focused on ensuring that the site-region shortcode in two Markdown files accurately included 'us3', providing clear and up-to-date guidance for customers deploying Metric Streams with Kinesis Data Firehose. The work centered on documentation skills and proficiency with Markdown, addressing the need for precise technical communication as AWS regions expand. No bug fixes were required during this period, and the contribution streamlined onboarding for users by reducing confusion around regional support for CloudWatch Metric Streams integrations.