This common word in English has a few different meanings:
A tag is a piece of paper that shows how much something costs. You can also use the words "price tag."
price tag
Is there a tag on the lamp?
What does the price tag say?
What’s the price on the tag?
A popular game among children in the United States is called "tag." One child is "it" and he or she tries to touch, or tag, another child who then becomes "it."
I just tagged you. You’re it.
In baseball, tagging another player with the ball or the ball in a glove prevents that player from running on the bases or scoring.
The catcher tagged the runner with his glove.
The word "tag" is also used with the preposition "along" to form the idiom, "tag along." This means to follow someone.
If you go to the convention, do you mind if I tag along?
Jeremy is tired of having his little brother tag along everywhere he goes.
Journalists tag along with President Obama when he visits other countries.
Recently, the word "tag" has been used when identifying someone’s picture on a social media site like Facebook.
I tagged all of my friends in the picture so that they could find it online.
