# Tag
<a name="API_Tag"></a>

Describes a tag key and optional value assigned to an Amazon Lightsail resource.

For more information about tags in Lightsail, see the [Amazon Lightsail Developer Guide](https://docs.aws.amazon.com/lightsail/latest/userguide/amazon-lightsail-tags).

## Contents
<a name="API_Tag_Contents"></a>

 ** key **   <a name="Lightsail-Type-Tag-key"></a>
The key of the tag.  
Constraints: Tag keys accept a maximum of 128 letters, numbers, spaces in UTF-8, or the following characters: \$1 - = . \$1 : / @  
Type: String  
Required: No

 ** value **   <a name="Lightsail-Type-Tag-value"></a>
The value of the tag.  
Constraints: Tag values accept a maximum of 256 letters, numbers, spaces in UTF-8, or the following characters: \$1 - = . \$1 : / @  
Type: String  
Required: No

## See Also
<a name="API_Tag_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/lightsail-2016-11-28/Tag) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lightsail-2016-11-28/Tag) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lightsail-2016-11-28/Tag)