tag
Definitions
A label attached to someone or something for the purpose of identification or to give information.
A children's game in which one player chases others and tries to touch them to make them 'it'.
To attach a label or identifying mark to a person or object.
Examples
Please make sure to tag your luggage with your contact information before checking it in.
The children were running around the playground playing a game of tag.
I decided to tag my friend in the photo so she would see it on her profile.