Tags

💡 Definition

Tags are metadata (labels) that you assign to AWS resources. Each tag consists of a key and an optional value, both of which you define.

🔑 Key Concepts

• Metadata: Information about the resource, not the resource itself.
• Key-Value Pair: e.g., Key=Environment, Value=Production.
• Organization: The primary way to organize resources in AWS.
• Not Unique: Many resources can share the same tag.

⚙️ How it Works

You add tags when you create a resource or later via the console, AWS CLF-C02/docs/cli, or AWS Tag Editor. You can then filter resources by these tags in various services.

🎯 Use Cases

• Cost Allocation: Tracking spend by Cost Center, Project, or Team in Cost Explorer.
• Automation: Identifying resources to back up ("Backup=True") or stop at night.
• Access Control: Using IAM policies to allow access only to resources with specific tags ("Department=HR").
• Resource Grouping: Creating AWS Resource Groups.

💰 Pricing Model

• Free: Tagging itself is free.

📝 Exam Tips (CLF-C02)

• Critical for Cost Allocation (Cost Allocation Tags).
• Case-sensitive.
• Up to 50 tags per resource.
• Used for organizing, tracking, and securing resources.

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See Also: * AWS Resource Groups * AWS Tag Editor * Cost Explorer