# Tags for your Application Load Balancer target group
<a name="target-group-tags"></a>

Tags help you to categorize your target groups in different ways, for example, by purpose, owner, or environment.

You can add multiple tags to each target group. Tag keys must be unique for each target group. If you add a tag with a key that is already associated with the target group, it updates the value of that tag.

When you are finished with a tag, you can remove it.

**Restrictions**
+ Maximum number of tags per resource—50
+ Maximum key length—127 Unicode characters
+ Maximum value length—255 Unicode characters
+ Tag keys and values are case-sensitive. Allowed characters are letters, spaces, and numbers representable in UTF-8, plus the following special characters: \$1 - = . \$1 : / @. Do not use leading or trailing spaces.
+ Do not use the `aws:` prefix in your tag names or values because it is reserved for AWS use. You can't edit or delete tag names or values with this prefix. Tags with this prefix do not count against your tags per resource limit. 

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#### [ Console ]

**To manage the tags for a target group**

1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).

1. On the navigation pane, under **Load Balancing**, choose **Target Groups**.

1. Choose the name of the target group to open its details page.

1. On the **Tags** tab, choose **Manage tags** and do one or more of the following:

   1. To update a tag, enter new values for **Key** and **Value**.

   1. To add a tag, choose **Add tag** and enter values for **Key** and **Value**.

   1. To delete a tag, choose **Remove** next to the tag.

1. Choose **Save changes**.

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#### [ AWS CLI ]

**To add tags**  
Use the [add-tags](https://docs.aws.amazon.com/cli/latest/reference/elbv2/add-tags.html) command. The following example adds two tags.

```
aws elbv2 add-tags \
    --resource-arns target-group-arn \
    --tags "Key=project,Value=lima" "Key=department,Value=digital-media"
```

**To remove tags**  
Use the [remove-tags](https://docs.aws.amazon.com/cli/latest/reference/elbv2/remove-tags.html) command. The following example removes the tags with the specified keys.

```
aws elbv2 remove-tags \
    --resource-arns target-group-arn \
    --tag-keys project department
```

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#### [ CloudFormation ]

**To add tags**  
Update the [AWS::ElasticLoadBalancingV2::TargetGroup](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-elasticloadbalancingv2-targetgroup.html) resource to include the `Tags` property.

```
Resources:
  myTargetGroup:
    Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
    Properties:
      Name: my-target-group
      Protocol: HTTP
      Port: 80
      TargetType: ip
      VpcId: !Ref myVPC
      Tags: 
        - Key: 'project'
          Value: 'lima'
        - Key: 'department'
          Value: 'digital-media'
```

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