Pound key意思

"Pound key" or "pound sign" is a term used to refer to the symbol "#" on a telephone keypad or keyboard. It is called the pound key because in some countries, including the United States, the symbol is referred to as "pound." In other countries, it is known as the "hash" or "number sign."

The pound key is typically used to enter a number or code on a phone or to trigger certain functions in software or applications. For example, on many smartphones, pressing the pound key after dialing a number can bring up a menu of options or allow you to access additional features.

In text messages and social media, the pound sign is often used to introduce a hashtag, which is a way to group messages or posts together based on a keyword or topic. When you include a hashtag in a post, it becomes clickable and allows users to see other posts that use the same hashtag.