标签 (biāoqiān) means "tag" or "label," and in modern usage often refers to a hashtag or topic tag on social media. It can also mean a physical label attached to an item.
请给这个包裹贴上价格标签。
Qǐng gěi zhège bāoguǒ tiē shàng jiàgé biāoqiān.
Please put a price tag on this package.
她在社交媒体上给照片加了好几个标签。
Tā zài shèjiāo méitǐ shàng gěi zhàopiàn jiāle hǎo jǐ gè biāoqiān.
She added several tags to the photo on social media.
超市里每件商品都有标签,方便顾客查看价格。
Chāoshì lǐ měi jiàn shāngpǐn dōu yǒu biāoqiān, fāngbiàn gùkè chákàn jiàgé.
Every product in the supermarket has a label, making it convenient for customers to check prices.